Question: Which coach of the Washington Capitols, Tri-Cities Blackhawks, and Boston Celtics has an annual National Basketball Association's Coach of the Year trophy named in his honor?
Sentence (from "NBA Coach of the Year Award"): The winner is selected at the end of regular season by a panel of sportswriters from the United States and Canada, each of whom casts a vote for first, second and third place selections.
Relevant evidence: No