Premise: "A boy in shorts is holding hands with a girl in jeans on a sunny day."\nHypothesis: "A brother and sister walk to the park on a summer day."\nDo we know that the hypothesis entailed by the premise?
Let's think step by step below.
it is not possible to tell
A girl and a boy do not have to be brother and sister.

.

The final answer: it is not possible to tell