What is the relationship between Euronext and Nord Pool in the context of the input sentence. Choose an answer from: 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.

So Anthony Attia will answer your first question on the ambition of the Euronext of CSDs and Giorgio will answer your 3 questions on the debt listing on Nord Pool and on the cost structure.

Answer: subsidiary