Sentence 1: A fourth daughter, Leonora, was the step-great-grandmother of astronomer and astrophysicist Cecilia Payne-Gaposchkin. Sentence 2: A fourth daughter, Leonora, was the stepmother of astronomer and astrophysicist Cecilia Payne-Gaposchkin. Question: Do sentence 1 and sentence 2 express the same meaning? - Yes or No? - Yes or No?
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