She's studied chimpanzees for over 35 years, and was the first to describe how chimps make tools of twigs to dig termites out of their mounds&#151;up until then toolmaking was thought to be a behavior that separated humans from animals.
(She; 's studied; chimpanzees; T:for over 35 years) (She; was; the first to describe how chimps make tools of twigs) (the first; to describe; how chimps make tools of twigs) Context(the first to describe,List([53, 74))):(chimps; make; tools of twigs to dig termites out of their mounds&#151;up until then toolmaking) (a behavior; separated; humans; from animals)
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She She the first chimps a behavior
's studied was to describe make separated
chimpanzees T:for over 35 years
the first to describe how chimps make tools of twigs
how chimps make tools of twigs
tools of twigs to dig termites out of their mounds&#151;up until then toolmaking
humans from animals