Anchor: Flags are used at all beaches to advise swimmers of sea a green flag means the sea is safe for swimming, while a red flag warns of danger.
Entailed: At the beach, a green flag means it is safe to swim and a red flag means danger.
Contradiction: Red flags mean safety and green flags mean danger at the beach. 
Contradiction: Three girls are wearing yellow dresses.
Contradiction: a boxer leaps in the cow
Contradiction: The people are running.
Contradiction: Dogs play together.