Anchor: a large group of children performing on a stage in front of an audience
Entailed: Some children are onstage, with observers.
Contradiction: Children are taking swimming lessons at the YMCA.
Contradiction: Every chief information officer has already ben filled. 
Contradiction: They were not happy about it.
Contradiction: The marina and the ocean were not separated by the Balboa Peninsula.
Contradiction: Three men are speaking.