Context: Electric railways use electric locomotives to haul passengers or freight in separate cars or electric multiple units, passenger cars with their own motors. Electricity is typically generated in large and relatively efficient generating stations, transmitted to the railway network and distributed to the trains. Some electric railways have their own dedicated generating stations and transmission lines but most purchase power from an electric utility. The railway usually provides its own distribution lines, switches and transformers.

Question: What is used to haul passengers cars?
Answer: electric locomotives

Question: How is electricity being generated for electric locomotives?
Answer: generating stations

Question: What entity provides distribution lines, switches and transformers?
Answer: railway

Question: Which railways haul passengers and freight in the same cars?
Answer: Unanswerable

Question: What is typically generated in small generating stations?
Answer: Unanswerable

Question: All electric railways have their own dedicated what?
Answer: Unanswerable

Question: Very few purchase power from whom?
Answer: Unanswerable

Question: What is generated in relatively inefficient stations?
Answer: Unanswerable