Utilize the input text as a context reference, choose the right relationship between American and Cleveland 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.

So when the League of American Orchestras (LAO) went into its annual convention in Cleveland this spring it was in subdued and introspective mood, concerned not to rock a listing boat, exercising a flummery of euphemisms by which every problem is a challenge, every steep decline a temporary setback.

Answer: headquarters_location