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.

Fri, Jul 31, 2015, 08:56 BST - UK Markets close in 7 hrs 34 mins 5 Questions About SK Group The Wall Street Journal – 2 hours 15 minutes ago Print On Aug. 1, South Korea’s third-largest conglomerate, SK Group, merges its holding company SK Holdings Co. with an affiliate company.

Answer: owned_by: SK Group, SK