instruction:
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.
question:
What note is produced at the twelfth fret of the top (highest pitched) string on a conventionally tuned guitar?
answer:
e

question:
Gibbons and orang-utans are types of which creature?
answer:
ape

question:
Who plays John Watson in the TV drama 'Sherlock'?
answer:
martin freeman