What is the relationship between Marathon Oil and Petroleum 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.

(DNR) $3.76 -7.39% Marathon Oil Corp. (MRO) $16.25 -7.04% Anadarko Petroleum Corp. (APC) $72.39 -5.55% Sandisk Corp (NasdaqGS: SNDK - news ) .

Answer: product_or_material_produced