QUESTION: Given the sentence "Two dirt bike riders in midair." is it true that "They are performing some tricks."?

Let's solve it slowly: Bike riders being in midair does not necessarily mean they are performing some tricks.
The answer is it is not possible to tell.

[QUESTION] Test for natural language inference.
Premise: "A girl beside a blue tarp wall wearing a backpack and a purse."
Hypothesis: "A girl is next to something blue."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
The girl is beside a blue tarp which means she must be next to something blue.
The answer is yes.

Q: Given the sentence "A festival is going on right outside a lake." can we conclude that "With several drummers in red shirts and a man on stilts playing the drums."?
Options:
- yes
- it is not possible to tell
- no
A: A man on stilts in a top hat is playing the drums.
The answer is it is not possible to tell.

QUESTION: Given the sentence "A man with a long ponytail is working on tiling a floor." can we conclude that "A man have ponytail and he is working on tiling a floor."?
Options:
- yes
- it is not possible to tell
- no

Let's solve it slowly: Man have ponytail is the same as man with a long ponytail.
The answer is yes.

[QUESTION] Test for natural language inference.
Premise: "Many people riding bikes on a path while another person is walking toward them."
Hypothesis: "Many people are on a path."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
Many people on a path does imply man people are on a path.
The answer is it is not possible to tell.

Q: Test for natural language inference.
Premise: "A man wearing shorts leaps off a rock into the ocean."
Hypothesis: "A man wearing shorts jumping into ocean to get away from a bear."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
A:
Not all men jump into the ocean to get away from a bear.
The answer is it is not possible to tell.