Premise: "A girl with long hair and a microphone stands in front of a crowd of people."\nHypothesis: "A girl is about to put on a performance on stage."\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
A girl with a microphone is not necessarily about to put on a performance.

.

Therefore, the answer is it is not possible to tell