While many votes are yet to be cast, the lukewarm initial reception raises the possibility that UAW officials may need to revisit the bargaining table with Fiat Chrysler Chief Executive Sergio Marchionne , or move on to Ford Motor F -3.03 % Co. or General Motors Co. GM -2.89 % and return to Fiat Chrysler later.
Refer to the input text as context and select the correct relationship between 'Sergio Marchionne' and 'Fiat' from the available options.
Options: parent organization, founded by, employer, distributed by