[Q] Premise: "A janitor stands on a moving walkway whilst cleaning in an airport."
Hypothesis: "A janitor is cleaning the front area of the airport."
Do we know that the hypothesis entailed by the premise?
[A] The front area of an airport does not always necessarily have to have a moving walkway. And moving walkways do not have to be placed in the front area of the airport. They can be put anywhere in the airport. Or the airport can just not have them.
The answer is it is not possible to tell.

[Q] Premise: "A man trying to tie a little cow down with a rope."
Based on this premise, can we conclude that the hypothesis "The man untied the cow." is true?
Options:
- yes
- it is not possible to tell
- no
[A] Either the man is trying to tie or has untied the cow.
The answer is no.

[Q] Given the sentence "The man in the red and yellow costume is holding a red flag." can we conclude that "A man dressed in a mermaid costume sang to his girlfriend."?
Options:
- yes
- it is not possible to tell
- no
[A] The same man cannot be wearing a mermaid costume singing while wearing a red and yellow costume is holding a flag.
The answer is no.