premise1: Hippie jam band guitarist rocks out with keytar player in background.
premise2: A musician holding a guitar soulfully sings with his eyes closed.
premise3: A band is performing at a rock and roll concert.
premise4: The musician is playing the guitar and singing.
premise: Hippie jam band guitarist rocks out with keytar player in background. A musician holding a guitar soulfully sings with his eyes closed. A band is performing at a rock and roll concert. The musician is playing the guitar and singing.
hypothesis: Guys sitting.