Question: On what date was the cosmonaut born that is believed to have landed off-course and been held by the Chinese government?
Sentence (from "Vladimir Ilyushin"): Major General Vladimir Sergeyevich Ilyushin (Russian: Владимир Серге́евич Ильюшин ) (March 31, 1927, Moscow  – March 1, 2010) was a Soviet general and noted test pilot, and the son of aerospace engineer Sergei Ilyushin.
Relevant evidence: Yes