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.

Which London Underground line connects Euston and Waterloo?
northern line

Who was awarded the Nobel Prize in Literature in 1932, the citation reading 'for his distinguished art of narration which takes its highest form in The Forsyte Saga'?
john galsworthy

With which instrument do you associate jazz musician Freddie Hubbard?

trumpet