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.

At book publishing, HarperCollins had a strong quarter with revenues down only 3% to $407 million and segment EBITDA up 9% to $47 million despite significant bricks-and-mortar store closures, which was a far better performance than we had anticipated.

Answer: publisher: was, HarperCollins