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

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