e/Sultan (ape)

Information
has gloss	eng: Sultan, one of the brightest of the early chimpanzees used for psychological research, was tested by Gestalt psychologist Wolfgang Köhler. Sultan is particularly recognized for his insight in solving numerous problems, including stacking or manipulating boxes to reach a reward and use of two sticks as a unit to rake food to a reachable distance.
lexicalization	eng: Sultan
instance of	c/Famous chimpanzees