Utilize the input text as a context reference, choose the right relationship between 'classic' and 'General Motors' from the options.
Options: director/manager, manufacturer, chief executive officer, distribution format

The automaker says that Post to Facebook GM, Kettering converting famous factory to car museum DETROIT -- General Motors and Kettering University will convert a historic car factory in Flint, Mich., into an archive and research center that will house a collection of classic cars.
manufacturer