Premise: A man sits in a chair in the middle of a busy sidewalk wearing an umbrella hat.

Hypothesis: A man is wearing an umbrella hat.
yes

Premise: Construction workers balance on a narrow beam far above the ground.

Hypothesis: Construction workers are on the narrow beam and looking down at everyone
it is not possible to tell

Premise: A man wearing a helmet has his hand up in the air and is shouting in a similar way the crowd behind his doing.

Hypothesis: A man is wearing a helmet
yes

Premise: A man in a blazer is playing piano and singing into a microphone.

Hypothesis: A man is playing a guitar.
no