Premise: Heavy metal ( or simply metal ) is a genre of rock music that developed in the late 1960s and early 1970s , largely in the United Kingdom and the United States . Led Zeppelin . They were inducted into the Rock and Roll Hall of Fame in 1995 ; the museum 's biography of the band states that they were `` as influential '' during the 1970s as the Beatles were during the 1960s .
Hypothesis: Led Zeppelin played rock music.
Label: ENTAILMENT