Premise: "A man on a very tall unicycle entertains the crowd."\nHypothesis: "A man rides the unicycle at the fair."\nDo we know that the hypothesis entailed by the premise?
Step-by-step reasoning:
it is not possible to tell
A man riding a unicycle to entertain a crowd is not necessarily at the fair.

He could be out on the street or at some other event.

.

So, the final answer is it is not possible to tell