Question: Alex Trebek hosted a game show in the 1970's that help shape him into the television personality he as become and the host of what syndicated game show?
Sentence (from "Alex Trebek"): George Alexander "Alex" Trebek {'1': ", '2': ", '3': ", '4': "} ( ; born July 22, 1940) is a Canadian-American television personality.
Relevant evidence: Yes