Refer to the input text as context and select the correct relationship between 'DESFA' and 'DEPA' from the available options.
Options: legal form, distribution format, parent organization, manufacturer

-- SOCAR, Azerbaijan's state energy company, to buy stakes in Greek natural gas grid operator DESFA from Greek natural gas utility DEPA (notified Oct (HKSE: 3366.HK - news ) .
parent organization