Take context from the input text and decide on the accurate relationship between 'Phosagro' and 'MOSCOW' from the options provided.
Options: director/manager, platform, headquarters location, owned by

MOSCOW Aug 3 Russian fertiliser producer Phosagro said on Monday that its agent Citigroup Global Markets Deutschland had reopened a facility that allows conversions between Phosagro's global depositary receipts (GDRs) and ordinary shares.
headquarters location