Given the input sentence, please extract the subject and object containing a certain relation in the sentence according to the following relation types, in the format of "relation1: word1, word2; relation2: word3, word4". Relations include: 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.

Chairman Orrin Hatch (R-Utah) and top Democrat Ron Wyden (Ore.) told Canadian Ambassador Gary Doer that his nation must agree to significantly expand market access for U.S. dairy exports in any 12-nation Trans-Pacific Partnership (TPP) deal or face the prospect of losing congressional support.

Answer: position_held: Gary Doer, Ambassador