Anchor: A surfer stays on his surfboard as he rides on a wave in the ocean.
Entailed: A surfer is in the ocean.
Contradiction: A surfer is heading out to the beach.
Contradiction: John was going to leave the desk until last. 
Contradiction: A person throwing a rock.
Contradiction: San Casciano is located north of the city of Florence.
Contradiction: A group of women are performing in a band with a man.