TASK DEFINITION: You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.
PROBLEM: Category: BASEBALL & THE PRESIDENCY 
Clue: As both vice president & president, he threw out a season's 1st pitch, each time for a different Senators franchise

SOLUTION: richard nixon

PROBLEM: Category: "FIRST" PHRASES 
Clue: The earliest known use of this term was in an Indianapolis Star opinion piece of September 20, 1914

SOLUTION: first world war

PROBLEM: Category: GODS OF ANCIENT EGYPT 
Clue: Appropriately, the center of cult worship for this ancient Egyptian god was in Cynopolis, "City of the Dog"

SOLUTION:
anubis