[Q] Given the sentence "A child in a blue sweater holds a pen in his mouth." is it true that "A man is holding a pencil."?
[A] A child is not a man and a pen is not a pencil.
The answer is no.

[Q] Premise: "A man in an orange and black shirt holding a helmet."
Hypothesis: "The man is on a motorcycle."
Do we know that the hypothesis entailed by the premise?
[A] A man in an orange and black shirt holding a helmet does not indicate that he is on a motorcycle.
The answer is it is not possible to tell.

[Q] Premise: "An asian young woman is walking outside carrying a book and wearing headphones."
Hypothesis: "A woman is eating dinner at the restaurant."
Do we know that the hypothesis entailed by the premise?
[A] A woman can't be eating dinner at the restaurant while walking outside.
The answer is no.