Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.

[EX Q]: The counties of Alameda, El Dorado, Fresno, Marin, Mariposa, Nevada, Orange, Riverside, Sacramento, San Bernardino, San Joaquin, San Mateo, Santa Clara, Santa Cruz, Sonoma and Ventura are in what state of the USA?
[EX A]: santa clara, california

[EX Q]: Aldebaran is the brightest star in which constellation?
[EX A]: aldebaran

[EX Q]: What city is home to the University of Colorado?
[EX A]:
colorado