[QUESTION] Given the sentence "A brown labradoodle retrieves a tennis ball in a lake." is it true that "Child throws tennis ball into lake for brown dog to fetch."?
A dog retrieving a ball from a lake can be done for a variety of purposes beyond fetch and the ball could have gotten there from many more ways than simply a 'child throws.
The answer is it is not possible to tell.

Q: Premise: "A young boy points a toy rifle off-camera."
Hypothesis: "A boy is holding a toy rifle."
Do we know that the hypothesis entailed by the premise?
A: The boy points a toy rifle so he must be holding a toy rifle.
The answer is yes.

QUESTION: Premise: "A young man is skateboarding on a road with 3 other people behind him."
Hypothesis: "The man is riding his bike in front of the zoo animals."
Do we know that the hypothesis entailed by the premise?

Let's solve it slowly: The two actions don't match. The man can't be skateboarding and on his bike at the same time.
The answer is no.

[QUESTION] Test for natural language inference.
Premise: "A man and a woman are up on a stage with microphones in their hands."
Hypothesis: "Frogs are hoping."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
Frogs are unlikely to be hoping to be on stage. They may be hopping mad to realize they cannot hold a microphone.
The answer is no.

Q: Can we conclude from "A person in a hang-glider." that "A man is preparing to glide."?
Options:
- yes
- no
- it is not possible to tell
A: Person in hang-glider does not imply he is preparing to glide.
The answer is it is not possible to tell.

[QUESTION] Can we conclude from "Three men are deciding to eat a chicken from a local store." that "Three males are running a marathon."?
Options:
- yes
- no
- it is not possible to tell
The three males cannot be running a marathon if they are eating chicken from a local store.
The answer is no.