Premise & hypothesis.
A group of men in different color attire are running a marathon.

People running a race
++++++++++
true or not.
yes

Premise & hypothesis.
An elderly woman carrying plants on a long bridge over the river.

An old woman is carrying flowers.
++++++++++
true or not.
it is not possible to tell

Premise & hypothesis.
The women are wearing red shirts, and singing.

The singers are men wearing black shirts
++++++++++
true or not.
no