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

July 19 (Reuters) - Royal Dutch Shell (Xetra: R6C1.DE - news ) , which is all set to acquire rival BG Group Plc (LSE: BG.L - news ) , may cut its capital expenditure for the year by several billion dollars from the previously announced $33 billion figure, the Financial Times reported on Sunday, citing sources.
parent organization