Royal Dutch Shell (Xetra: R6C1.DE - news ) and BG Group (LSE: BG.L - news ) were both sharply higher after Shell (LSE: RDSB.L - news ) 's second-quarter results beat expectations.
Analyze the relationship between 'BG Group' and 'Royal Dutch Shell' within the context of the input sentence.
Options: currency, parent organization, director/manager, headquarters location