On the supply side, recent speculation that Russia might be willing to cooperate with the Organization of the Petroleum Exporting Countries (OPEC) to curb output in support of prices was given a blow on Monday after the chief executive of Russian oil major Rosneft ruled out a Russian cut.
Analyze the relationship between 'Rosneft' and 'Petroleum' within the context of the input sentence.
Options: parent organization, product/material produced, member of, publisher