It (Other OTC: ITGL - news ) would be wrong to say City investors are on the point of insurrection over Royal Dutch Shell (Xetra: R6C1.DE - news ) ’s blockbuster takeover bid for BG Group (LSE: BG.L - news ) .
What is the relationship between 'BG Group' and 'Royal Dutch Shell' in the context of the input sentence.
Options: stock exchange, parent organization, developer, publisher