Anchor: Many people with numbered stickers on their shirts are walking and running in a 5k event.
Entailed: People are participating in a running competition.
Contradiction: A man is playing guitar on the street.
Contradiction: The man is walking around talking to people.
Contradiction: Downsizing has less to do with improvements, and more with burdening the work force.
Contradiction: A bird is flying through the air.
Contradiction: There were around 70,000 items in the ancient library of Alexandria.