Conversation so far:
Why did Mike Gravel move to Alaska?
Mike Gravel decided to become a pioneer in a faraway place, and moved to pre-statehood Alaska.
when did Mike Gravel move to alaska
Mike Gravel decided to become a pioneer in a faraway place, and moved to pre-statehood Alaska in August 1956.

Question: What did he do in alaska
Self-contained rewrite: What did Mike Gravel do in alaska