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.

DMGT's explanation of a general "marked deterioration in the UK print advertising market in the quarter" is credible, because local newspaper group Johnston Press said the same thing last week, noting in particular that advertisers chose to reduce or delay their spend around the time of the General Election.
industry: Johnston Press, newspaper