Sentence 1: Blagoy Ivanov challenged Mehmen for the WSOF Heavyweight Championship on October 17, 2015. <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> Question: Do sentence 1 and sentence 2 express the same meaning? - Yes or No? - Yes or No?
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