Question: What was the nickname of the founder of Heaven's Gate?
Sentence (from "Marshall Applewhite"): Marshall Herff Applewhite, Jr. (May 17, 1931 – March 26, 1997), also known as "Bo" and "Do", among other names, was an American cult leader who founded what became known as the Heaven's Gate religious group and organized their mass suicide in 1997, claiming the lives of thirty-nine people.
Relevant evidence: Yes