Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.

What is the second book of the Bible?
bible

What is the name of the US electric car manufacturer, founded in 2003, whose cars include the Model S and the Model X?
tesla model s

On Christmas Day 1977, Menachem Begin of Israel met with Anwar Sadat of Egypt to start peace talks.  Which one of them was celebrating their birthday that day?

egypt