Premise: "A woman running in a marathon wearing a blue tank top and black shorts and socks with a yellow tag with numbers 3646 on the front of her top."\nHypothesis: "This is the womans first marathon."\nDo we know that the hypothesis entailed by the premise?
Let’s work this out in a step by step way to be sure we have the right answer.
it is not possible to tell
People can run marathons any number of times and aren't limited to running only a first marathon.

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Thus, the answer is it is not possible to tell