Take context from the input text and decide on the accurate relationship between 'BG Group' and 'Royal Dutch Shell' from the options provided.
Options: employer, parent organization, position held, owned by

BRUSSELS, July 30 (Reuters) - European Union antitrust regulators will decide by Sept. 2 whether to approve Royal Dutch Shell (LSE: RDSB.L - news ) 's planned 47 billion pound ($73.25 billion) buy of BG Group (LSE: BG.L - news ) to become the world's top liquefied natural gas company.
parent organization