Complex sentence: Volvo City Taxi was a concept car built by Volvo in 1977 as Volvo's response to a challenge from the New York office of transport and the Museum of Modern Art. The City Taxi was powered by a six cylinder diesel engine driving the front wheels.
Split into simpler sentences: Volvo City Taxi was a concept car built by Volvo in 1977. It was designed to be Volvo's response to a challenge from the New York office of transport and the Museum of Modern Art. The City Taxi was powered by a six cylinder diesel engine which drove the front wheels.