Premise & hypothesis.
A man in a helmet is riding a bike.

A person is riding a bike down the street.
++++++++++
true or not.
it is not possible to tell

Premise & hypothesis.
A man and woman walk across an empty street.

The dogs are chasing each other.
++++++++++
true or not.
no

Premise & hypothesis.
A group of young children wearing backpacks are gathered together and watching a woman in brown shorts and a white t-shirt.

Young children gather to play a video game.
++++++++++
true or not.
no