Utilize the input text as a context reference, choose the right relationship between land and Seattle from the options. Options: 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.

Economic growth and demand for office space fueled by the expansion of technology companies in cities like Seattle and San Francisco has made it harder for Skanska to find land at reasonable prices.

Answer: location_of_formation