[Q] Given the sentence "An older man with gray hair and a white baseball hat is hunched over and his head is on his knees." is it true that "There is a person with a head covering."?
[A] A white baseball hat is a type of a head covering.
The answer is yes.

[Q] Test for natural language inference.
Premise: "An old skinny man wearing the dirty white shirt riding on a bicycle on the street."
Hypothesis: "A man is biking to work."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
[A] Riding in a white shirt on a bicycle on the street does not necessarily mean biking to work.
The answer is it is not possible to tell.

[Q] If "Two big brow dogs who look alike wrestle." does that mean that "Two animals are fighting."?
Options:
- yes
- it is not possible to tell
- no
[A] The dogs may look like they are fighting but the could be very excited and are actually just fighting.
The answer is it is not possible to tell.