-- 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-OL.HK - news ) .
Take context from the input text and decide on the accurate relationship between 'DESFA' and 'DEPA' from the options provided.
Options: legal form, owner of, founded by, parent organization