text: This species was infected by the PtERV1 retrovirus four million years ago, possibly causing aspeciation event.
full_question: This species was infected by the PtERV1 retrovirus four million years ago, possibly causing aspeciation event. Before she was moved to a namesake facility in Ellensburg, Washington, a female one ofthese animals was cared for by Allen and Beatrix Gardner and later by Roger Fouts. Some of these animalsplaced stalks of grass in termite holes to "fish" for termites, and formed (*) troops that cannibalized rivals.One of them named Washoe was the first non-human to learn ASL, inspiring research of one of these animals witha name punning on "Noam Chomsky." These animals share the genus Pan with bonobos, and groups of them werestudied in Gombe by the primatologist Jane Goodall. For 10 points, name these great apes more closely related tohumans than gorillas.
first_sentence: This species was infected by the PtERV1 retrovirus four million years ago, possibly causing aspeciation event.
raw_answer: chimpanzees [or Pan troglodytes; prompt on great apes before it is read; prompt on primates before "primatologist" is read] 