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.

[Q]: Who painted ' The Surrender at Breda ' and ' Las Meninas ' ?
[A]: diego velazquez


[Q]: Who wrote the words to Jerusalem?
[A]: william blake


[Q]: Which London Underground line connects Euston and Waterloo?
[A]:
northern line