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.

Mr Murdoch is a big admirer of Joel Klein, Amplify’s chief executive and the former head of education for New York City but the potential sale or winding down of News Corp’s involvement suggests that there are limits to that admiration.

Answer: location_of_formation: chief, New York City