Utilize the input text as a context reference, choose the right relationship between BG Group and Royal Dutch Shell 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.

Oil producers decline Oil producers, including Royal Dutch Shell (Xetra: R6C1.DE - news ) and BG Group (LSE: BG.L - news ) , headed south as Brent crude hovered just under $49 per barrel, the lowest level since January.

Answer: parent_organization