Premise & hypothesis.
A person riding a snowboard goes over a snowy ramp.

An olympic athlete competing for the snowboarding medal.
++++++++++
true or not.
it is not possible to tell

Premise & hypothesis.
Guys and girls are standing around holding black flags with Asian characters.

Guys and girls are holding flags.
++++++++++
true or not.
yes

Premise & hypothesis.
child sitting on a ladies shoulders and clapping her hands.

A person clapping her hands.
++++++++++
true or not.
yes