Consider the question. Test for natural language inference.
Premise: "Two women on rollerskates with helmets and elbow and knee pads jostle one another as they skate."
Hypothesis: "The championship roller derby match is in progress."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
 What is the step-by-step reasoning process to arrive at the answer: it is not possible to tell?
Two women skating and jostling each other aren't necessarily in a championship match.