Utilize the input text as a context reference, choose the right relationship between cornerstone and marketing 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.

And while 150,000 views is an incredibly impressive number, what is even more exciting is how the webcast has become a cornerstone for an entirely new digital marketing strategy for Walker & Dunlop.

Answer: industry