Premise & hypothesis.
Public workers are doing some kind of a job.

Public workers in blue shirts are planning something.
++++++++++
true or not.
it is not possible to tell

Premise & hypothesis.
Some people watch football on a TV screen in a shop.

The shop sells TVs.
++++++++++
true or not.
it is not possible to tell

Premise & hypothesis.
A group of African children dressed in mismatched clothing sing and play instruments.

The kids are singing in a school play.
++++++++++
true or not.
it is not possible to tell