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soviet-union × 101history × 29
russia × 18
vostok-program × 10
landing × 7
venus × 7
n-1 × 7
voskhod-program × 7
crewed-spaceflight × 6
luna × 6
rockets × 5
identify-this-object × 5
soyuz-spacecraft × 5
spaceflight-firsts × 5
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venera × 5
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