Student asked: Given the sentence "A woman balancing tennis ball on a tennis racket." is it true that "A woman is practicing for a big tennis game."?
Teacher's response: Let's think. A woman balancing tennis ball on a tennis racket is not necessarily practicing for a big tennis game. The answer is it is not possible to tell.

Student asked: Given the sentence "People are crossing the signal." can we conclude that "They are running late."?
Options:
- yes
- it is not possible to tell
- no
Teacher's response: Let's think. People crossing at the signal does not mean they are late for anything. The answer is it is not possible to tell.

Student asked: Given the sentence "A chain through whole where a man can be seen at a work site." can we conclude that "The man is inside his house."?
Options:
- yes
- it is not possible to tell
- no
Teacher's response: Let's think. One can't be inside a house and at a work site. The answer is no.

Student asked: Test for natural language inference.
Premise: "A man jumps off a swing set at a park."
Hypothesis: "The man is showing off."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
Teacher's response:
Let's think. To jump off a swing set does not imply showing off. The answer is it is not possible to tell.