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:
Martha Dandridge was the 1st lady of which American President?

Ex Output:
george washington

Ex Input:
Adrian Dalsey, Larry Hillblom and Robert Lynn founded which mail service in 1969?

Ex Output:
dhl express

Ex Input:
Who was the third President of the USA, following on from George Washington and John Adams was also famed for his numerous inventions?

Ex Output:
thomas jefferson