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.

Meanwhile, Poetsch worked in the background, ensuring that Volkswagen Group had the financial means to absorb bold acquisitions masterminded by his fellow Austrian, Piech, such as the purchase of truck makers MAN and Scania , sportscar maker Porsche and motorbike maker Ducati .

Answer: subsidiary: Volkswagen Group, Scania; subsidiary: Volkswagen Group, Porsche