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

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