QUESTION: Premise: "A police officer is standing in a doorway."
Hypothesis: "A policeman is chasing a suspect in his patrol car."
Do we know that the hypothesis entailed by the premise?

Let's solve it slowly: A officer is not standing if he is chasing someone in his car.
The answer is no.

QUESTION: Premise: "A emergency were paramedics and the fire department were called in to help."
Hypothesis: "No one responded to the 911 call."
Do we know that the hypothesis entailed by the premise?

Let's solve it slowly: If no one responded on the 911 call then the paramedics and the fire department were not called in to help.
The answer is no.

QUESTION: Premise: "Little boy swinging fast in tire swing."
Hypothesis: "A boy is going down a slide."
Do we know that the hypothesis entailed by the premise?

Let's solve it slowly:
The boy can't be going down a slide while on a tire swing.
The answer is no.