Original sentence: The two student populations were combined to form the new school, the first were those from Robert Jamieson High School in Oyster Pond,: the second were those students who lived in the communities of Lake Echo, Porter.s Lake and Chezzetcook who had been attending Graham Creighton High School
Edited sentence: The two student populations were combined to form the new school, the first were those from Robert Jamieson High School in Oyster Pond,: the second were those students who lived in the communities of Lake Echo, Porters Lake and Chezzetcook who had been attending Graham Creighton High School