Given an trivia question precisely answer the question with a word/phrase/name. External resources such as Wikipedia could be used to obtain the facts.

Ex Input:
Who wrote `Frankenstein`?

Ex Output:
mary shelley


Ex Input:
Which metal is mainly derived from the ore haematite?

Ex Output:
iron


Ex Input:
Which former American football star was acquitted of killing his ex-wife and was later convicted of armed robbery and kidnapping?

Ex Output:

o. j. simpson