Anchor: A man wearing glasses plays guitar in front of a microphone.
Entailed: A man is playing a guitar.
Contradiction: A man is playing racquetball.
Contradiction: An ACI system does not require any excavation.
Contradiction: A Tennis player wearing a black hat is hitting the ball.
Contradiction: Two men are drinking sodas at the beach.
Contradiction:  I was trying not to look back, In case I would see something I didn't want to.