[QUESTION] Given the sentence "A man in white is singing his heart out." is it true that "A man is doing karaoke at a bar."?
The man singing doesn't indicate he is doing karaoke or at a bar.
The answer is it is not possible to tell.

[QUESTION] Test for natural language inference.
Premise: "Boy in martial arts-style uniform holding a sword."
Hypothesis: "A boy holds a sword at martial arts class."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
It is possible the boy be dressed and armed for martial arts without attending a class.
The answer is it is not possible to tell.

[QUESTION] Test for natural language inference.
Premise: "Two young girls are playing and laughing in a green grassy yard."
Hypothesis: "Two young girls are having fun outside together."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
Playing and laughing implies having fun and the girls are in a grassy yard so they must be outside.
The answer is yes.

[QUESTION] Premise: "A black bird sits in a dead tree."
Hypothesis: "The black bird is in a nest."
Do we know that the hypothesis entailed by the premise?
The birds nest does not have to be in the tree.
The answer is it is not possible to tell.