I'll give you a question, please answer with step-by-step reasoning process.
Test for natural language inference.\nPremise: "Two young girls are riding horses within a white fence."\nHypothesis: "Two girls racing horses within a pen with a white fence."\nIs the hypothesis entailed by the premise?\nOptions:\n- yes\n- no\n- it is not possible to tell

it is not possible to tell
Riding doesn't imply racing.

The fact that the horses are within a fence doesn't imply within a pen.

.

The answer is it is not possible to tell