Q: Premise: "A guy is paddling a boat with a lot of force."
Hypothesis: "A man is paddling a boat on a river."
Is the hypothesis entailed by the premise?
Options:
- yes
- it is not possible to tell
- no
A: A man could be paddling a boat in other types of waterways besides a river.
The answer is it is not possible to tell.

Q: Given the sentence "Masked protester surrounded by the police." can we conclude that "The police and the protester are on a trapeeze."?
Options:
- yes
- it is not possible to tell
- no
A: One cannot be surrounded by the police and on a trapeze simultaneously.
The answer is no.

Q: Can we conclude from "A tennis player collecting tennis balls in a tennis court." that "He is cleaning up the court."?
Options:
- yes
- no
- it is not possible to tell
A: He is not necessarily cleaning the court if he is collecting tennis balls.
The answer is it is not possible to tell.

Q: Premise: "Two athletic men climbing a waterfall."
Hypothesis: "Two men climbed the waterfall."
Do we know that the hypothesis entailed by the premise?
A:
If you climbed the waterfall at one time they were climbing it.
The answer is yes.