Anchor: A boy on a bicycle is looking at the building.
Entailed: The bike has a single rider.
Contradiction: The young woman rides a bicycle.
Contradiction: A girl rubs her bald head.
Contradiction: Four people are looking out while a woman is talking to her friend.
Contradiction: No wonder HMOs are signing up 3 new Medicare clients every three months. 
Contradiction: The statement is emphasized.