What is the relationship between 'BG Group' and 'natural gas' in the context of the input sentence.
Options: distribution format, chairperson, product/material produced, owned by

CAIRO, July 26 (Reuters) - BG Egypt, a subsidiary of BG Group and one of Egypt's largest natural gas producers, has appointed Khaled Kacem as its president, the company said in a statement on Sunday.
product/material produced