What is the relationship between AMP Capital and Sydney 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.

AMP Capital managing director office and industrial Louise Mason said the landmark Quay Quarter Sydney project was a "further demonstration of AMP Capital's long-term commitment to Circular Quay", where it built Australia's first skyscraper and where the company has been located for more than 50 years.

Answer: headquarters_location