Premise: "A rock band playing some of their hits at a concert while in front of a crowd with l.e.d. lights flashing as they play the guitars and a guy in the background beats on the drums."\nHypothesis: "A rock band performs on stage."\nDo we know that the hypothesis entailed by the premise?
Think hard. Detailed solution:
yes
A rock band performs on stage if they are in front of a crowd.

.

The answer is yes