sentences:  In 1970 the project with Washoe and the Gardners relocated to the Institute of Primate Studies in Norman, Oklahoma.The Gardners and Fouts taught the chimpanzees signs from American Sign Language (ASL) by modeling (demonstration and getting the chimps to imitate) and physical prompting (directly manipulating the chimpanzees' hands into the required shapes).As the studies progressed, they found that the animals used ASL to communicate with each other.