Refer to the input text as context and select the correct relationship between 'BG Group' and 'Royal Dutch Shell' from the available options.
Options: industry, chief executive officer, parent organization, headquarters location

389.55p +1.05% Royal Dutch Shell (Xetra: R6C1.DE - news ) 'B' (RDSB) 1,906.00p +0.69% Royal Dutch Shell 'A' (RDSA) 1,892.00p +0.67% BG Group (LSE: BG.L - news ) (BG.)
parent organization