Premise: A man is playing a violin on a stage.

Hypothesis: A person is on stage
yes

Premise: A man wearing a plaid hat sits in a lawn chair reading a magazine

Hypothesis: A sad man wearing a plaid hat sits in a lawn chair reading a magazine
it is not possible to tell

Premise: Person grinding a piece of metal.

Hypothesis: The person in the factory.
it is not possible to tell

Premise: A man with a gas mask and goggles on his head.

Hypothesis: A man is preparing for a nuclear apocalypse.
it is not possible to tell