Question: When did the houston astros start playing baseball?
qaPairs: question: When did the houston astros start playing baseball as the Colt .45s?
answer: April 10, 1962
question: When did the houston astros start playing exhibition baseball as the Astros?
answer: April 9 1965
question: When did the houston astros start playing official baseball games as the Astros in the Astrodome?
answer: April 12 1965