What is the relationship between 'MoneyGram' and 'DALLAS' in the context of the input sentence.
Options: owner of, employer, product/material produced, headquarters location

DALLAS (June 30, 2015) (GLOBE NEWSWIRE) -- MoneyGram ( MGI ), a global provider of innovative money transfer services, is expanding its official check network through a new agreement with Founders Federal Credit Union to provide official check services.
headquarters location