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.

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

Output: george washington


Input: Consider Input: Which city is the home of the Palais du Luxembourg?

Output: paris


Input: Consider Input: Mark Zuckerberg and Eduardo Savarin are two of the creators of which social networking service, launched in February 2004?


Output: facebook