Context: 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.

Question: Which group studied gorillas in 2006-07?
Answer: Wildlife Conservation Society

Question: What region is home to the gorillas studied by the Wildlife Conservation Society?
Answer: Sangha Region

Question: What was responsible for maintaining the separation between the gorillas and humans?
Answer: inhospitable swamps

Question: When did researchers from the Wildlife Conservation Society study chimps?
Answer: Unanswerable

Question: Where did researchers study chimps in heavily forested regions?
Answer: Unanswerable

Question: How many chimpanzees live in the area?
Answer: Unanswerable

Question: What has kept the chimps isolated from humans?
Answer: Unanswerable

Question: In what kind of regions did researchers not find any gorillas?
Answer: Unanswerable