generate questions: In 2006–07, researchers from the Wildlife Conservation Society studied gorillas in heavily forested regions centered on the Ouesso district of the Sangha Region. They suggest a population on the order of 125,000 Western Lowland Gorillas, whose isolation from humans has been largely preserved by inhospitable swamps.
Which group studied gorillas in 2006-07? {sep_token} What region is home to the gorillas studied by the Wildlife Conservation Society? {sep_token} What was responsible for maintaining the separation between the gorillas and humans? {sep_token}