What is the relationship between Maersk Drilling and Maersk 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.

* Says Maersk Drilling has been awarded a contract extension for the jack-up rig Maersk Innovator with ConocoPhillips for work on the Eldfisk field offshore Norway

Answer: parent_organization