Premise: "A rock band is performing on a dark stage."\nHypothesis: "A famous band is playing at a music festival."\nDo we know that the hypothesis entailed by the premise?
Let’s work this out in a step by step way to be sure we have the right answer.
it is not possible to tell
Not all rock bands are a famous band and not all stages are at a music festival.

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The answer is it is not possible to tell