Input question: What was initiated by Pope Urban II's sermon at Clermont in 1095?

Output answer: first crusade

Input question: Sebastiano Carezo is credited with inventing which Spanish dance in 1780?

Output answer: bolero

Input question: What Teamsters union leader mysteriously disappeared in 1975?

Output answer: jimmy hoffa

Input question: Whose visit to Vietnam in November 2000 was the first by a U.S. President since the end of the Vietnam War?

Output answer:
bill clinton