Premise: "A sea of people crammed between buildings gather in the street."
Hypothesis: "A sea of people swim in the ocean."
Do we know that the hypothesis entailed by the premise?

no
Explanation: One cannot be crammed between buildings and swim in the ocean simultaneously..

If "A white bird is standing on a wooden platform." does that mean that "A bird looking out for it's prey."?
Options:
- yes
- it is not possible to tell
- no

it is not possible to tell
Explanation: He can just be chilling and not looking out for it's prey..

Given the sentence "Two people are competing in a martial arts match." is it true that "Two men fight with staves in a dojo."?

it is not possible to tell
Explanation: Competing does not imply to fight and not all martial arts matches are in a dojo..

Premise: "A young boy is dancing around."
Hypothesis: "The boy is practicing for a competition."
Do we know that the hypothesis entailed by the premise?
it is not possible to tell
Explanation: A young boy is dancing does not mean that he is practicing for a competition..