In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
Q: The western gorilla ( " Gorilla gorilla " ) is a great ape .
A: 
The western gorilla ( " Gorilla gorilla " ) is a great ape — the type species as well as the most populous species of the genus " Gorilla " .