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.

Italy's former prime minister Silvio Berlusconi, who controls Mediaset, has signed a pre-sale agreement to sell 48 percent of his AC Milan soccer club to a group led by Thai businessman Bee Taechaubol by the end of September, a spokesman for holding company Fininvest said on Sunday.

Answer: industry: Fininvest, holding company; headquarters_location: Fininvest, Milan