Question: In what state are the headquarters of this American multinational automaker, which has a 50:50 joint venture with Changan Automobile?

Related documents: [0]  [DOC] Changan Ford (officially Changan Ford Automobile Co., Ltd.) is an automotive manufacturing company headquartered in Chongqing, China and a 50:50 joint venture between Changan Automobile and Ford Motor Company. The company's principal activity is the manufacture of Ford brand passenger cars for the Chinese market. The company was formed in Dec. 2012 after the decision to restructure Changan Ford Mazda, whereby Ford and Mazda agreed to work with Changan as separate joint ventures. Currently, Changan Ford's entire production base is the largest manufacturing location outside Detroit, Michigan for Ford. It has plants in Chongqing, Hangzhou & Harbin. [END] 
[1]  [DOC] The Ford Motor Company (commonly referred to simply as "Ford") is an American multinational automaker headquartered in Dearborn, Michigan, a suburb of Detroit. It was founded by Henry Ford and incorporated on June 16, 1903. The company sells automobiles and commercial vehicles under the Ford brand and most luxury cars under the Lincoln brand. Ford also owns Brazilian SUV manufacturer, Troller, and Australian performance car manufacturer FPV. In the past, it has also produced tractors and automotive components. Ford owns an 8% stake in Aston Martin of the United Kingdom, and a 49% stake in Jiangling of China. It also has a number of joint-ventures, one in China (Changan Ford), one in Taiwan (Ford Lio Ho), one in Thailand (AutoAlliance Thailand), one in Turkey (Ford Otosan), and one in Russia (Ford Sollers). It is listed on the New York Stock Exchange and is controlled by the Ford family, although they have minority ownership (but majority of the voting power). [END]  
Answer: Michigan
Michigan