[Q] Premise: "A child is eating something very close to the camera while other children sit at a table behind him."
Hypothesis: "A child is eating while sitting at a table."
Do we know that the hypothesis entailed by the premise?
[A] A child is eating while sitting at a table and other children are at a different table behind him.
The answer is yes.

[Q] Premise: "Man with widows peak reaching up rock face."
Hypothesis: "A man is sitting on an airplane."
Do we know that the hypothesis entailed by the premise?
[A] If a man is reaching up a rock face he is not sitting on an airplane.
The answer is no.

[Q] Premise: "Three young children strike poses wearing santa-hats in front of a christmas tree."
Hypothesis: "The children are surrounded by presents."
Do we know that the hypothesis entailed by the premise?
[A] Children in front of a Christmas tree does not imply they are surrounded by presents.
The answer is it is not possible to tell.