Utilize the input text as a context reference, choose the right relationship between Greg Fischer and Mayor 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.

"It's going to help us send that message around the world that this city has got it going on," Louisville Mayor Greg Fischer said.

Answer: position_held