Refer to the input text as context and select the correct relationship between 'G4S' and 'LONDON' from the available options.
Options: headquarters location, founded by, developer, distribution format

LONDON (Reuters) - Britain's G4S Plc (GFS.L) said it won a $187 million contract to provide security services to a gas plant in Iraq, while in Afghanistan, it renewed a contract to provide protection to the British government.
headquarters location