QUESTION: Given the sentence "A group of young and old practice together for an instrumental performance." is it true that "The members of an amateur band are practicing for tryouts to the london symphony orchestra."?

Let's solve it slowly: Practice together for an instrumental performance does not necessarily mean amateur band or that it is for tryouts to the London Symphony Orchestra.
The answer is it is not possible to tell.

QUESTION: Premise: "Three indian children playing in water."
Hypothesis: "Three siblings splash each other in a pool."
Is the hypothesis entailed by the premise?
Options:
- yes
- it is not possible to tell
- no

Let's solve it slowly: The three children aren't necessarily siblings. Children can play in water without trying to splash each other.
The answer is it is not possible to tell.

QUESTION: Can we conclude from "A dark-haired man wearing a backpack is walking down the street." that "A dark haired man walking in to the office."?
Options:
- yes
- no
- it is not possible to tell

Let's solve it slowly:
An office may down the street and can be walked into.
The answer is yes.