Utilize the input text as a context reference, choose the right relationship between Marathon Oil and Petroleum from the options. Options: 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