Given the sentence "A group of people are outside looking upwards." is it true that "The people are looking at the sky."?

yes
Explanation: The people are outside looking upwards so they must be looking at the sky..

Premise: "Boys in orange life jackets sitting on raft in water."
Hypothesis: "Boy's stranded overboard on a raft."
Do we know that the hypothesis entailed by the premise?

it is not possible to tell
Explanation: Boys in orange life jackets sitting on raft in water does not imply they are stranded overboard on a raft..

Test for natural language inference.
Premise: "A crowd of people are running in a race."
Hypothesis: "They monkeys throw bowling balls at each other."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell

no
Explanation: Subject could be either a crowd of several people or some monkeys..

Given the sentence "A young male is doing a bike trick on a bridge in the evening." is it true that "A young male practicing his bike tricks for the competition."?
it is not possible to tell
Explanation: People practice bike tricks for reasons on than practicing for the competition..