[QUESTION] Given the sentence "A group of firefighters are looking up in the air." is it true that "Teenagers gaze at their shoes."?
Firefighters are not teenagers. If people are looking up in the air then they are not gazing at their shoes.
The answer is no.

Q: Given the sentence "Three people squat down on the edge of a lake." can we conclude that "A concrete lot sits empty."?
Options:
- yes
- it is not possible to tell
- no
A: The edge of a lake is not a concrete lot. If there's three people it's not empty.
The answer is no.

QUESTION: Test for natural language inference.
Premise: "A man in green holding a sign hugs a blond woman."
Hypothesis: "A man wears red and hugs a brunette woman."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell

Let's solve it slowly: Green and red are different colors. Blond and brunette descriptions of two different hair colors.
The answer is no.

[QUESTION] Premise: "A man wearing a bicycle helmet and two young boys are covered in fall leaves in a playground."
Hypothesis: "The man is burying the kids upto their necks in sand."
Is the hypothesis entailed by the premise?
Options:
- yes
- it is not possible to tell
- no
The kids can't be covered in leaves if they are buried in sand.
The answer is no.

Q: Can we conclude from "An adult and three children are rowing a canoe down a river." that "A mother and her three children are rowing down a river."?
Options:
- yes
- no
- it is not possible to tell
A: An adult and three children rowing a canoe are not necessarily a mother and her children.
The answer is it is not possible to tell.

[QUESTION] Given the sentence "Chinese workers are working at a factory." can we conclude that "People have lunch in an empty gymnasium."?
Options:
- yes
- it is not possible to tell
- no
Working and having lunch are two different things and factory is not an empty gymnasium.
The answer is no.