Assertion: human's skull | /r/PartOf | middle-aged female
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Source sentences:
text: In April 1947, while blasting at Sterkfontein, he and John T. Robinson discovered a skull belonging to a middle-aged female (catalogue number STS 5) which he also classified as Plesianthropus transvaalensis (it was dubbed "Mrs. Ples" by Broom's young coworkers although the skull is now thought to have belonged to a young male).