LONDON, Sept 2 (Reuters) - Royal Dutch Shell (Xetra: R6C1.DE - news ) gained EU approval on Wednesday for its $70 billion acquisition of Britain's BG Group (LSE: BG.L - news ) , the second of four key markets needed to clear the deal.
What is the relationship between 'BG Group' and 'Royal Dutch Shell' in the context of the input sentence.
Options: manufacturer, parent organization, currency, platform