Question:  Comic Relief USA was a non-profit charity organization hosted in part by a stand-up comedian who rose to fame in what television series?
Sentence (from "Comic Relief USA"): Although Comic Relief's charity work is continuous, its fundraising events were held and televised at irregular intervals—and primarily by Home Box Office (HBO), with comedians Robin Williams, Billy Crystal, and Whoopi Goldberg as the hosts each time.
Relevant evidence: Yes