Anchor: A singing group dressed in black is singing a song on stage.
Entailed: A group dressed in black are singing.
Contradiction: The lady showed off her dancing skills.
Contradiction: An elderly man takes a nap on the couch.
Contradiction: Since there was no legal aid in Pomona, the bar association started a monthly family law clinic. 
Contradiction: The man is playing the string bass.
Contradiction: There is a person playing football.