In the context of the input sentence, determine the relationship between 'BG Group' and 'Royal Dutch Shell'.
Options: location of formation, director/manager, parent organization, founded by

Glencore rose the most, up 3.2 percent, with fellow miner BHP Billiton (NYSE: BBL - news ) also among the biggest gainers, while energy companies BG Group (LSE: BG.L - news ) and Royal Dutch Shell (Xetra: R6C1.DE - news ) climbed 2.3 and 1.3 percent respectively.
parent organization