The most improved brand is General Motors (NYSE: GM ) ("CEO Mary Barra has made it her goal to ... make sure errors of the past are not forgotten and not repeated"), followed by Target (NYSE: TGT ), travel website Trivago and GM brands Chevrolet and Buick.
Refer to the input text as context and select the correct relationship between 'Mary Barra' and 'General Motors' from the available options.
Options: director/manager, brand, employer, operator