Premise & hypothesis.
A man with a white shirt is sitting at a table in a room with other people and posters along the blue wall.

People are sitting in a room.
++++++++++
true or not.
yes

Premise & hypothesis.
A black dog jumps at a ball held by a man wearing blue jeans, a blue striped shirt, and a dark blue jacket.

The man wearing a blue outfit is a dog trainer.
++++++++++
true or not.
it is not possible to tell

Premise & hypothesis.
A boy wearing a striped hoodie is staring at a pigeon on a street.

A boy tosses bread to a pigeon on the street.
++++++++++
true or not.
it is not possible to tell