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 major BP PLC BP., +6.04% BP, +5.98% tacked on 6%, Royal Dutch Shell PLC RDSB, +4.67% RDS.B, +3.60% rose 4.7% and BG Group PLC BG., +4.10% moved up 4.1%.

Answer: parent_organization