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.

333.45p -3.54% Royal Dutch Shell 'B' (RDSB) 1,599.00p -3.41% Weir Group (WEIR) 1,245.00p -3.04% BG Group (LSE: BG.L - news ) (BG.)

Answer: parent_organization