Anchor: A band performs on stage with 4 members visible 2 with guitars or bass one with a microphone only.
Entailed: The band is performing on a stage.
Contradiction: The band is performing on grass.
Contradiction: Musicians are not playing music.
Contradiction: The son is helping his elderly mother.
Contradiction: A dog is jumping.
Contradiction: This sign of weakness caused delight in reactionary factions.