In the context of the input sentence, determine the relationship between 'BG Group' and 'Royal Dutch Shell'.
Options: position held, product/material produced, currency, parent organization

Fri, Sep 25, 2015, 14:05 BST - UK Markets close in 2 hrs 25 mins Are BP Plc, Royal Dutch Shell Plc & BG Group plc Worth Holding In Your Portfolio?
parent organization