At our conference call today, we have with us the Chief Accountant Mr. Mikhail Rosseev and also Deputy Chairman of the Management Committee at PJSC Gazprom, as well as representatives of key departments at PJSC Gazprom, Gazprom Export and Gazprom Neft.
Take context from the input text and decide on the accurate relationship between 'Gazprom Export' and 'Gazprom' from the options provided.
Options: employer, headquarters location, legal form, parent organization