Q: Given the sentence "A man with the face paint of a clown holds a ukulele and harmonica." is it true that "A clown is performing."?
A: Just because a clown is holding a ukulele and harmonica means the clown is performing.
The answer is it is not possible to tell.

Q: If "A group of people do tricks on motorbikes." does that mean that "A group of people are doing hand stands."?
Options:
- yes
- it is not possible to tell
- no
A: People cannot do tricks on motorbikes while doing handstands because it is impossible to ride a motorbike in the handstand position.
The answer is no.

Q: If "A boy in a bright blue shirt with white helmet in on a skateboard doing tricks on a ramp." does that mean that "The boy is riding for fun."?
Options:
- yes
- it is not possible to tell
- no
A: The boy might be in a competition and not just riding for fun.
The answer is it is not possible to tell.

Q: If "A man in an office is playing with a child." does that mean that "A youngster is at an office."?
Options:
- yes
- it is not possible to tell
- no
A:
A child is a youngster and he/she is located in an office.
The answer is yes.