Premise & hypothesis.
A group of people dress up and participate in role playing games.

Several people are dressed up in costumes and are playing different roles.
++++++++++
true or not.
yes

Premise & hypothesis.
A young woman, scantily dressed and wearing a red bandanna, is dancing barefoot on the sidewalk.

young woman barefoot.
++++++++++
true or not.
yes

Premise & hypothesis.
People are sitting in a boat on the water.

The boat sank when the people got in it.
++++++++++
true or not.
no