Premise: A man and young boy pulling together a grill.

Hypothesis: Two people are putting together a grill.
yes

Premise: The lady in the trench coat is sweeping the bird off the table.

Hypothesis: A woman is trying to clean up her table.
it is not possible to tell

Premise: People are standing and smiling in the middle of a city intersection.

Hypothesis: A parade is about to happen.
it is not possible to tell

Premise: Enthusiastic sport fans celebrating a victory.

Hypothesis: Fans celebrate a win.
yes