Question: What is crew member Yuri Gagarin's Vostok?
Paraphrase: What is the Vostok of Yuri Gagarin's crew member?
SPARQL (Wikidata):  select distinct ?sbj where { ?sbj wdt:P1029 wd:Q7327 . ?sbj wdt:P31 wd:Q624038 } 
Answer: Vostok 1