What is the relationship between Comerica and DETROIT 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.

DETROIT - General Motors is partnering with the Detroit Tigers, Michigan Veterans Affairs Agency (MVAA), U.S. Chamber of Commerce and more than 50 local employers at a Hiring Our Heroes job fair and career training workshop for U.S. military veterans and their families today at Comerica Park.

Answer: location_of_formation