Refer to the input text as context and select the correct relationship between 'Phosagro' and 'MOSCOW' from the available options.
Options: owned by, platform, headquarters location, director/manager

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