Refer to the input text as context and select the correct relationship between 'BG Group' and 'Royal Dutch Shell' from the available options.
Options: parent organization, member of, owner of, founded by

The three largest oil companies BP, Royal Dutch Shell (LSE: RDSB.L - news ) and BG Group (LSE: BG.L - news ) alone make up 13.3pc of the index by weight.
parent organization