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Ai (born in 1976, estimated) is a female Western chimpanzee (Pan troglodytes verus), currently living at the Primate Research Institute of Kyoto University (acronym KUPRI). She is the first subject of the Ai project, a research program started in 1978 by Kiyoko Murofushi and Tetsuro Matsuzawa which is aimed at understanding chimpanzee cognition through computer interface experiments.