Anchor: People respond to unseen excitement at an outdoor gathering.
Entailed: People at an outdoor event.
Contradiction: A group watches a movie inside.
Contradiction: Two BMX bikers are swimming.
Contradiction: At the age of 30, I have delayed my college loans and returned to graduate school. 
Contradiction: Exactly fifty straight years.
Contradiction: My researchers sampled over 35 different toothpastes.