Anchor: A large crowd of people walking while being controlled by officers among them.
Entailed: A group of people are walking with police officers.
Contradiction: Children are having a picnic.
Contradiction: A photographer takes a picture of an empty bucket.
Contradiction: There are children.
Contradiction: Its construction was for the World's Fair of 2002, and was a small engineering feat.
Contradiction: A group of people are gathered outside.