premise: Two men playing electric guitars, both have beards, and the girl in between them may be a singer. hypothesis: Two men are playing the guitar with a girl in the middle of them.
entailment: The two men playing the guitar in sentence two are the same two men playing electric guitars with beards in sentence one.  The girl in the middle of them as in the two men in sentence one is the same girl in sentence two.  Essentially, these are two sentences saying nearly the same thing.