Black Sabbath are often cited as pioneers of a genre of pop music that developed in the late 1960s and early 1970s.
Black Sabbath are often cited as pioneers of heavy metal music .	heavy metal music	heavy metal music	Black Sabbath	Black Sabbath (album)
Heavy metal -LRB- or simply metal -RRB- is a genre of rock music that developed in the late 1960s and early 1970s , largely in the United Kingdom and the United States .	United Kingdom	United Kingdom	United States	United States	rock music	rock music
