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]: Who was the father of Edward the Elder, the Anglo-Saxon King from 899 to 924?
[EX A]: edward the elder

[EX Q]: Which South American country has land borders with Colombia and Peru?
[EX A]:
peru