Premise: People try out a game demo at a trade show.

Hypothesis: People try out a demo.
yes

Premise: A small child is watched by an adult as it walks in the street.

Hypothesis: A child walks in the street.
yes

Premise: A postal carrier with a big smile stands on the sidewalk with his cart of mail.

Hypothesis: A postal carrier with a big smile is standing on the sidewalk delivering mail.
it is not possible to tell

Premise: A group of people sitting on benches at a city park.

Hypothesis: Group of people sitting on benches waiting for race to begin
it is not possible to tell