Take context from the input text and decide on the accurate relationship between 'Sergio Marchionne' and 'Fiat' from the options provided.
Options: parent organization, distributed by, employer, founded by

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.
employer