QUESTION: Given the sentence "Two kids lie on a rug near wooden blocks and smile." is it true that "Two kids smiling."?

Let's solve it slowly: Smile is the same thing as smiling but in a different tense.
The answer is yes.

QUESTION: Premise: "A young girl and boy wearing jackets and boots."
Hypothesis: "Pose for a picture in front of a dinosaur fossil."
Do we know that the hypothesis entailed by the premise?

Let's solve it slowly: Two young children pose for a picture being taking by their father.
The answer is it is not possible to tell.

QUESTION: Premise: "A man with dreads and a guitar."
Hypothesis: "Is clapping while performing on stage."
Do we know that the hypothesis entailed by the premise?

Let's solve it slowly:
A man doesn't know how to play guitar so he claps instead.
The answer is it is not possible to tell.