Question

What did koko tell us what were present for gorillas

Answer 1

If it is picking out a sentence in the paragraph, I would say "Researchers have been able to use this inherent intelligence to teach Koko sign language.

Answer 2

One of the first words that Koko used to describe herself was Queen. The gorilla was only a few years old when she first made the gesture—sweeping a paw diagonally across her chest as if tracing a royal sash. “It was a sign we almost never used!” Koko's head-caretaker Francine Patterson laughed.