Anchor: A large group of people look as if they are in a band, and they are practicing classical music with guitars, violins, and cellos.
Entailed: A large group of people are playing instruments.
Contradiction: The people are playing computers.
Contradiction: There is a drummer with long hair and ripped jeans.
Contradiction: Everybody is drinking cocktails.
Contradiction: A rock band is playing a show.
Contradiction: A rock band plays a Beatles song.