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Direct Quotation:

Version One:
The existence of a signing ape unsettled linguists and startled animal behaviorists (Davis 26).

Version Two:
If the presence of a sign-language-using chimp was disturbing for scientists studying language, it was also surprising to scientists studying animal behavior (Davis 26).

Version Three:
According to Flora Davis, linguists and animal behaviorists were unprepared for the news that a chimp could communicate with its trainers through sign language (Davis 26).

Version Four:
Animals can communicate, research demonstrates.