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.

Bayer AG still plans to list its Covestro plastics unit on the stock market this year, undeterred by volatility that sent indexes in Europe down the most since 2008, according to people familiar with the matter.

Answer: owned_by: Covestro, Bayer