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.

Among other standouts, Italian oil group Saipem (Amsterdam: QG6.AS - news ) retreated 6.4 percent after cutting its guidance, and that weighed on the Milan stock market which fell 0.3 percent.

Answer: headquarters_location: Saipem, Milan