| 401. | Finland | Wikipedia audio article | 1 | |
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| 402. | Vijayanagara literature in Kannada | Wikipedia audio article | 1 | |
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| 403. | Sayings of Jesus on the cross | Wikipedia audio article | 1 | |
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| 404. | Title of Nobility Clause | Wikipedia audio article | 1 | |
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| 405. | List of World War II puppet states | Wikipedia audio article | 1 | |
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| 406. | James Madison | Wikipedia audio article | 1 | |
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| 407. | Lemma (mathematics) | Wikipedia audio article | 0 | |
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| 408. | Statistical parameter | Wikipedia audio article | 0 | |
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| 409. | Kerala Mathematical Association | Wikipedia audio article | 0 | |
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| 410. | Dawah | Wikipedia audio article | 0 | |
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| 411. | Flow (mathematics) | Wikipedia audio article | 0 | |
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| 412. | Bistromathic Drive | Wikipedia audio article | 0 | |
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| 413. | Amorphous solid | Wikipedia audio article | 0 | |
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| 414. | Flexible-fuel vehicle | Wikipedia audio article | 0 | |
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| 415. | Ruislip Woods | Wikipedia audio article | 0 | |
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| 416. | Edward Thorndike | Wikipedia audio article | 0 | |
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| 417. | Bayesian linear regression | Wikipedia audio article | 0 | |
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| 418. | Opacity (optics) | Wikipedia audio article | 0 | |
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| 419. | Triadica sebifera | Wikipedia audio article | 0 | |
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| 420. | Novella | Wikipedia audio article | 0 | |
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| 421. | Tayammum | Wikipedia audio article | 0 | |
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| 422. | Microphone | Wikipedia audio article | 0 | |
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| 423. | University of Geneva | Wikipedia audio article | 0 | |
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| 424. | Cave painting | Wikipedia audio article | 0 | |
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| 425. | Babassu oil | Wikipedia audio article | 0 | |
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| 426. | Volatiles | Wikipedia audio article | 0 | Vlog |
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| 427. | Auxanometer | Wikipedia audio article | 0 | |
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| 428. | Radiator (engine cooling) | Wikipedia audio article | 0 | |
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| 429. | Smithsonian (magazine) | Wikipedia audio article | 0 | |
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| 430. | Tenure | Wikipedia audio article | 0 | |
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| 431. | Vladimir Arnold | Wikipedia audio article | 0 | |
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| 432. | Military logistics | Wikipedia audio article | 0 | Vlog |
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| 433. | Silicon bandgap temperature sensor | Wikipedia audio article | 0 | |
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| 434. | 2005 World Aquatics Championships bids | Wikipedia audio article | 0 | |
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| 435. | Rip tide | Wikipedia audio article | 0 | |
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| 436. | Firearm | Wikipedia audio article | 0 | |
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| 437. | Fossils | Wikipedia audio article | 0 | |
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| 438. | Clinton-Sherman Industrial Airpark | Wikipedia audio article | 0 | |
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| 439. | Internal wave | Wikipedia audio article | 0 | |
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| 440. | Maria Lenk Aquatic Center | Wikipedia audio article | 0 | |
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| 441. | Pittsburgh, Pennsylvania | Wikipedia audio article | 0 | |
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| 442. | Pulsed plasma thruster | Wikipedia audio article | 0 | |
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| 443. | Yusaku Maezawa | Wikipedia audio article | 0 | |
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| 444. | Trainer (aircraft) | Wikipedia audio article | 0 | |
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| 445. | Packaging engineer | Wikipedia audio article | 0 | |
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| 446. | Men's World Floorball Championship | Wikipedia audio article | 0 | |
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| 447. | Aircraft engine position number | Wikipedia audio article | 0 | |
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| 448. | YF-100 | Wikipedia audio article | 0 | |
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| 449. | Late-type star | Wikipedia audio article | 0 | |
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| 450. | Early-type star | Wikipedia audio article | 0 | |
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| 451. | Tadashi Sasaki (engineer) | Wikipedia audio article | 0 | |
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| 452. | UTC-5 | Wikipedia audio article | 0 | |
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| 453. | Aquarium of Rhodes | Wikipedia audio article | 0 | |
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| 454. | Marine diesel engine | Wikipedia audio article | 0 | |
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| 455. | Project Ozma | Wikipedia audio article | 0 | |
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| 456. | Neurogenesis | Wikipedia audio article | 0 | |
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| 457. | Swimming at the 2017 World Aquatics Championships – Women's 400 metre individual medley | Wiki ... | 0 | |
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| 458. | World Trade Center rebuilding controversy | Wikipedia audio article | 0 | |
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| 459. | Swimming at the 1973 World Aquatics Championships – Men's 100 metre butterfly | Wikipedia audi ... | 0 | |
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| 460. | Global Entrepreneurship Week | Wikipedia audio article | 0 | |
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| 461. | Photovoltaics | Wikipedia audio article | 0 | |
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| 462. | Dementia | Wikipedia audio article | 0 | |
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| 463. | Raceway (aquaculture) | Wikipedia audio article | 0 | |
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| 464. | World Metrology Day | Wikipedia audio article | 0 | Vlog |
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| 465. | Swimming at the 2007 World Aquatics Championships – Men's 200 metre freestyle | Wikipedia audi ... | 0 | |
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| 466. | Nightworld: 30 Years to Life | Wikipedia audio article | 0 | |
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| 467. | The Engineer (magazine) | Wikipedia audio article | 0 | |
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| 468. | Military Historical Museum of Artillery, Engineers and Signal Corps | Wikipedia audio article | 0 | |
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| 469. | Sonic 3 and Knuckles | Wikipedia audio article | 0 | | Sonic the Hedgehog 2
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| 470. | Nature Podcast | Wikipedia audio article | 0 | Show |
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| 471. | Thermoelectric | Wikipedia audio article | 0 | |
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| 472. | World Health Organization's list of essential medicines | Wikipedia audio article | 0 | |
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| 473. | JTD engine | Wikipedia audio article | 0 | |
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| 474. | Mechanical engineering technology | Wikipedia audio article | 0 | Vlog |
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| 475. | List of forms of electricity named after scientists | Wikipedia audio article | 0 | |
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| 476. | IIHF World U18 Championships | Wikipedia audio article | 0 | |
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| 477. | The world's most northern | Wikipedia audio article | 0 | |
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| 478. | Mumbai underworld | Wikipedia audio article | 0 | |
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| 479. | Aquarium du Québec | Wikipedia audio article | 0 | |
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| 480. | James Walker (engineer) | Wikipedia audio article | 0 | |
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| 481. | Thrissur Corporation Electricity Department | Wikipedia audio article | 0 | |
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| 482. | Central Tsernozemsky Nature Reserve | Wikipedia audio article | 0 | |
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| 483. | World Policy Council | Wikipedia audio article | 0 | |
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| 484. | Centre for Environmental Policy | Wikipedia audio article | 0 | |
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| 485. | Venezuela at the 2011 World Aquatics Championships | Wikipedia audio article | 0 | |
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| 486. | Engine Company 23 | Wikipedia audio article | 0 | |
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| 487. | United States Army enlisted rank insignia | Wikipedia audio article | 0 | |
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| 488. | World Hockey Association | Wikipedia audio article | 0 | |
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| 489. | World Journal | Wikipedia audio article | 0 | |
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| 490. | List of World Heritage Sites in Morocco | Wikipedia audio article | 0 | |
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| 491. | Electric Forest (novel) | Wikipedia audio article | 0 | |
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| 492. | College of Engineering Munnar | Wikipedia audio article | 0 | |
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| 493. | United States Senate Armed Services Subcommittee on Strategic Forces | Wikipedia audio article | 0 | |
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| 494. | Macrobiotic | Wikipedia audio article | 0 | |
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| 495. | German occupation of the Baltic states during World War II | Wikipedia audio article | 0 | |
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| 496. | Showboat World | Wikipedia audio article | 0 | Show |
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| 497. | Magnetar | Wikipedia audio article | 0 | |
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| 498. | Open water swimming at the 2015 World Aquatics Championships – Women's 10 km | Wikipedia audio ... | 0 | |
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| 499. | Climate sensitivity | Wikipedia audio article | 0 | |
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| 500. | Connascence (computer science) | Wikipedia audio article | 0 | |
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