[Q] Premise: "Several uniformed men playing musical instruments."
Hypothesis: "Men in a parade perform in a marching band."
Do we know that the hypothesis entailed by the premise?
[A] Uniformed men could be playing musical instruments while sitting down or while marching in a band.
The answer is it is not possible to tell.

[Q] Premise: "A boy and a girl play on there floor with a train set."
Hypothesis: "One sibling sits alone."
Do we know that the hypothesis entailed by the premise?
[A] If a boy and girl play one sibling is not alone.
The answer is no.

[Q] Premise: "Children dressed in kimono are walking down the street to a children's festival."
Hypothesis: "Kids participate in a children's masquerade."
Do we know that the hypothesis entailed by the premise?
[A] Dressed in kimonos does not mean they participate in a masquerade.
The answer is it is not possible to tell.