[Q] Given the sentence "A brown dog barks at a gray dog in the grass." is it true that "The brown dog alerts at the strange gray dog."?
[A] A dog barks does not not always mean the dog alerts and the gray dog may or may not be strange.
The answer is it is not possible to tell.

[Q] If "A man and his children in a boat." does that mean that "A man and his children taking a ride on a boat outside."?
Options:
- yes
- it is not possible to tell
- no
[A] Being in a boat normally implies taking a ride in this boat outside.
The answer is yes.

[Q] Premise: "Four people in dark clothes walk in the same direction."
Based on this premise, can we conclude that the hypothesis "The group of four are walking towards the concert venue." is true?
Options:
- yes
- it is not possible to tell
- no
[A] To walk in the same direction does not imply to walk towards the concert venue.
The answer is it is not possible to tell.