What is the relationship between 'BG Group' and 'Royal Dutch Shell' in the context of the input sentence.
Options: business division, manufacturer, founded by, parent organization

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.)
parent organization