[QUESTION] Given the sentence "Two children look up." can we conclude that "Two children look up at a bird."?
Options:
- yes
- it is not possible to tell
- no
Look up does not imply to look up at a bird.
The answer is it is not possible to tell.

Q: Premise: "Three dirt bike racers head over a jump."
Hypothesis: "Three racers are jumping while more racers join in."
Do we know that the hypothesis entailed by the premise?
A: The three diet bikers can be alone and do not need to have more racers joining them.
The answer is it is not possible to tell.

QUESTION: Premise: "The singer in a band is singing into a microphone while the other members are playing their guitars and drums."
Hypothesis: "The band has no singer."
Is the hypothesis entailed by the premise?
Options:
- yes
- it is not possible to tell
- no

Let's solve it slowly: The band cannot be stated as having a singer and being with no singer.
The answer is no.

[QUESTION] Given the sentence "Two lesbians having a great time getting wet." is it true that "Two men sit in a boring place."?
The mention of two men at boring place contradicts with the two lesbians having a great time .
The answer is no.

Q: Premise: "A girl is on the sidewalk looking at a white van in the street."
Based on this premise, can we conclude that the hypothesis "The ice cream van waits for customers." is true?
Options:
- yes
- it is not possible to tell
- no
A: A van does not have to be an ice cream van.
The answer is it is not possible to tell.

[QUESTION] Premise: "A helmeted bmx biker leaps into the air on his bike."
Hypothesis: "A rider doing a trick."
Is the hypothesis entailed by the premise?
Options:
- yes
- it is not possible to tell
- no
Leaping into the air on a bike is a bike trick.
The answer is yes.