What is the relationship between Buick and General Motors in the context of the input sentence. Choose an answer from: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

Meanwhile, the other Oshawa assembly line manufactures the current models of Chevrolet Impala, Buick Regal, Chevrolet Camaro and Cadillac XTS.In 2005, General Motors announced for the first time, the plans of closing the plant in 2008.

Answer: owned_by