Who was buried in Grant's Tomb?

https://en.wikipedia.org/wiki/Grant%27s_Tomb
On his radio and television show You Bet Your Life, comedian Groucho Marxoften asked contestants, "Who was buried in Grant's Tomb?" The riddle is based on the use of the word "buried." The correct answer is "no one," since Grant and his wife are entombed in sarcophagi above ground in an atrium rather than being buried in the ground. However, Marx often accepted the answer "Grant," nonetheless, and awarded a consolation prize to those who gave it. He used the question, among several other easy ones, to ensure that everyone won a prize on the show.