Analyze the relationship between 'Buick' and 'General Motors' within the context of the input sentence.
Options: owned by, business division, employer, chairperson

General Motors also plans to shift the production of most other Buick models, except the mid-sized LaCrosse sedan and the large Enclave crossover, to China or Europe soon (read more: General Motors to Sell China-made Buicks in US).
owned by