Anchor: Man singing and playing guitar for a small audience.
Entailed: Man singing in front of an audiance.
Contradiction: Man playing in front of a sold out crowd at Madison Square Garden.
Contradiction: They never try to outdo each other. 
Contradiction: The men are doing a job.
Contradiction: An elderly man and woman are sitting at a table in an empty restaurant.
Contradiction: There are humans at an organized event.