What is the relationship between 'ConocoPhillips' and 'Petroleum' in the context of the input sentence.
Options: manufacturer, product/material produced, founded by, creator

Both Marathon Petroleum and Phillips 66 were the downstream arms spun off from their parents in 2011 — Houston-based Marathon Oil Corp. (NYSE: MRO) and Houston-based ConocoPhillips (NYSE: COP).
product/material produced