Q: Given the sentence "A person places uncooked hamburger patties on a charcoal grill." is it true that "Someone is dancing."?
A: Placing uncooked patties on a grill and dancing cannot be done simultaneously.
The answer is no.

QUESTION: Test for natural language inference.
Premise: "An older woman with a striped shirt rubbing her chin."
Hypothesis: "A woman is rubbing her ear."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell

Let's solve it slowly: Different body parts as the object of the action are described here--rubbing chin and rubbing ear.
The answer is no.

[QUESTION] Test for natural language inference.
Premise: "A guy wearing an orange shirt and black shorts is running on a track."
Hypothesis: "The guy is in a race."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
A guy running on a track doesn't mean he is in a race.
The answer is it is not possible to tell.

Q: Premise: "A young man traveling on bus with a piece of flower in his hands."
Hypothesis: "A man is riding a bicycle with the flowers in his mouth."
Is the hypothesis entailed by the premise?
Options:
- yes
- it is not possible to tell
- no
A: A man traveling on a bus is not riding a bicycle simultaneously.
The answer is no.

QUESTION: If "A chubby man rides away down the street on a bike." does that mean that "A chubby man rides away on a bicycle."?
Options:
- yes
- it is not possible to tell
- no

Let's solve it slowly: Bike and bicycle are used interchangeably as part of the description of chubby man riding away.
The answer is yes.

QUESTION: Given the sentence "A man with a long black hair and beard." is it true that "Wearing a black shirt is sitting on rocks within a fenced in enclosure while holding the paw of a young polar bear."?

Let's solve it slowly:
A bearded man is at the zoo where he works with the polar bears.
The answer is it is not possible to tell.