What is the relationship between 'Sinopec' and 'Beijing' in the context of the input sentence.
Options: currency, headquarters location, industry, subsidiary

Bertoli also rates Tingyi Holding Corp (a maker of instant noodles and beverages in China), Astro Malaysia Holdings (a pay-TV provider), the Hong Kong-listed Beijing Capital International Airport and Sinopec Kantons Holdings (an oil terminal and pipeline provider in China).
headquarters location