QUESTION: Given the sentence "A woman with short blond-hair wearing sunglasses talking on a pink cellphone outside." is it true that "The woman talking to his boyfriend."?

Let's solve it slowly: A woman talking does not necessarily imply she is talking to his boyfriend.
The answer is it is not possible to tell.

[QUESTION] Test for natural language inference.
Premise: "A stunt bicyclist performs an aerial trick before a city skyline."
Hypothesis: "A bicyclist rides his bike calmly through the park."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
A bicyclist performs an aerial trick takes skill and practice while a bicyclist who rides his bike calmly is relaxing or exercising. A park is a different environment than a city skyline.
The answer is no.

Q: Premise: "A black dog is running through long grass with a colorful toy in its mouth."
Hypothesis: "A dog is playing with a ball just tossed to him."
Is the hypothesis entailed by the premise?
Options:
- yes
- it is not possible to tell
- no
A: Not all toys are balls. Their is no indication that the ball had just been tossed to the dog.
The answer is it is not possible to tell.

QUESTION: If "A skateboarder in a light green shirt." does that mean that "They are skating in the park."?
Options:
- yes
- it is not possible to tell
- no

Let's solve it slowly: The person who is skating in the park no need to be a skateboarder.
The answer is it is not possible to tell.

[QUESTION] Test for natural language inference.
Premise: "A dirt-bike racer taking a hard turn on a dirt course with one onlooker in the background."
Hypothesis: "The dirt-bike racer is on the bottom of the pool making turns."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
The dirt-bike racer cannot be on a dirt course and at the bottom of the pool making turns at the same time.
The answer is no.

Q: Given the sentence "A girl is lying on a brick pillar while a young man is sitting on another near her looking through a pamphlet." is it true that "Boyfriend and girlfriend together."?
A:
A girl lying on a pillar while a young man sits on another nearby doesn't mean they are boyfriend and girlfriend or that they are together.
The answer is it is not possible to tell.