Premise: A young man is' heading' a ball while on the beach, another young man, in the background, looks at him.

Hypothesis: There are multiple people present.
yes

Premise: O woman walks hurriedly past a department store with a red evening gown in the display window.

Hypothesis: The woman is late.
it is not possible to tell

Premise: A group of young people get into costume in a sparse room.

Hypothesis: People dressing for Comic Con.
it is not possible to tell

Premise: a proud older woman holds a very happy baby with his mouth wide open and both are smiling at each other.

Hypothesis: A grandmother holds her grandson
it is not possible to tell