[Q] Given the sentence "Young female examining a specimen in a microscope." is it true that "The young female is looking into a microscope."?
[A] The female is examining a specimen so she's also looking into a microscope.
The answer is yes.

[Q] Premise: "A large white puddle running along with a pink flip-flop in its mouth."
Hypothesis: "A dog is being chases by someone."
Do we know that the hypothesis entailed by the premise?
[A] Just because puddle running with a flip-flop in mouth doesn't imply being chases by someone.
The answer is it is not possible to tell.

[Q] Premise: "A group of people with unhappy faces are gathered together most likely waiting for someone or listening to someone speak."
Hypothesis: "A group of people are waiting."
Do we know that the hypothesis entailed by the premise?
[A] Waiting for someone to arrive or listening to someone speak are both examples of waiting.
The answer is yes.