Anchor: An artist works his craft on a damp city sidewalk in solitude.
Entailed: An artist is on the sidewalk.
Contradiction: An artist presenting his new piece to a museum crowd.
Contradiction: The total ended up being 25 pounds and not 50.
Contradiction: a guy with a helmet is in the sun
Contradiction: It was open to the public. 
Contradiction: The boy is kissing a man.