Premise & hypothesis.
A player falls on her knees during a roller derby.

A player is knocked over during a roller derby.
++++++++++
true or not.
it is not possible to tell

Premise & hypothesis.
A young girl is cleaning a hardwood floor with a Swiffer.

A dirty floor is being cleaned.
++++++++++
true or not.
yes

Premise & hypothesis.
Three people playing jump rope in a field.

The three people are jump roping for gym class.
++++++++++
true or not.
it is not possible to tell