What is the relationship between apartment and London in the context of the input sentence. Choose an answer from: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

A luxurious one bedroom apartment in this building in Cardiff Bay is available for £700 a month, much cheaper than the equivalent in London (Rightmove (LSE: RMV.L - news ) )

Answer: location_of_formation