In the context of the input sentence, determine the relationship between 'Bangkok Airways' and 'Bangkok'.
Options: platform, distribution format, business division, headquarters location

ACCRA, GHANA - 5 August 2015 - Emirates, a global connector of people and places, has today announced a new codeshare agreement with Thailand-based Bangkok Airways, a regional boutique airline, which is set to open up new destinations for Bangkok Airways and Emirates passengers from Europe, Australasia and South-East Asia regions.
headquarters location