Q: Generate a question which can yield the answer mentioned in the input. Generated question must be answered by the answer provided in input, without using any extra knowledge.
Context : British Marine Air Navigation Co Ltd was formed in 1923 in a joint venture between Supermarine and Southern Railway (owners of Southampton Docks), the Woolston base becoming Britain's first commercial flying boat base, with its own Customs and Immigration facilities.
Answer : Supermarine
A:
What is British Marine Air Navigation Co Ltd's parent company?