Original sentence: A widely reported explanation of the origins of the dish is that it was conceived at a Pakistani restaurant in Glasgow in the late 1970s, when a customer, who found the traditional chicken tikka too dry, asked for some gravy.The origins of chicken tikka masala are hotly disputed
Edited sentence: A widely reported explanation of the origins of the dish is that it was conceived at a restaurant in Glasgow in the late 1970s, when a customer, who found the traditional chicken tikka too dry, asked for some gravy.The origins of chicken tikka masala are disputed