Question: Are Joan Jett and Gene Simmons both singers?
Sentence (from "Gene Simmons"): Gene Klein, born Chaim Witz (Hebrew: חיים ויץ‎ ‎ , ] , born August 25, 1949), known professionally as Gene Simmons, is an Israeli-American musician, singer, songwriter, record producer, entrepreneur, actor and television personality.
Relevant evidence: Yes