Premise: The man in the gray shirt is staring at a man and a woman that are walking away from him.

Hypothesis: A man is staring at a man and a woman.
Relation: entailment

Hypothesis: A man is staring at them because they know him.
Relation: neutral

Hypothesis: A man in the black shirt is waving at a man and a woman that are walking towards him.
Relation: contradiction