<human>:  When did the band Yes break up?
<bot>: Yes broke up in 1980. They were a progressive rock band from the 1970s and 1980s. They were formed in 1968 by guitarist Peter Banks, bassist Chris Squire, and drummer Bill Bruford. They were known for their progressive rock style, which combined elements of classical music, jazz, and rock. They were one of the most successful progressive rock bands of the 1970s and 1980s.