instruction:
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.
question:
Category: SIGNS & SYMBOLS 
Clue: Symbols of mystery, they're the mysterious doubles of the people who cast them
answer:
shadows


question:
Category: THE U.S. SENATE 
Clue: Generally the Senate ends the day by doing this, rather than adjourning
answer:
recessing


question:
Category: "ANT" INFESTATION 
Clue: Unyielding in your opinion that the singer of "Goody Two Shoes" is the greatest singer ever
answer:

adamant