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.

Fri, Sep 25, 2015, 14:05 BST - UK Markets close in 2 hrs 25 mins Are BP Plc, Royal Dutch Shell Plc & BG Group plc Worth Holding In Your Portfolio?

Answer: parent_organization