a factor with levels Albuquerque
Alexandria, va
Anchorage
Asheville, NC
Atlanta
Baltimore
Baton Rouge
Billings, Mt
Birmingham, Al
Boise, Id
Boston
Buffalo
Burlington, Vt
Cedar Rapids
Charleston, WVA
Cheyenne, Wy
Chicago
Cincinnati
Cleveland
Columbia, SC
Concord, NH
Denver
Des Moines
Detroit
East St. Louis
Fargo, ND
Fort Smith, Ark
Fort Worth
Grand Rapids, Mi
Greensboro, NC
Honolulu
Houston
Indianapolis
Jackson, Miss
Kansas City
Knoxville, Tn
Las Vegas
Lexington, Ky
Little Rock
Los Angeles
Louisville
Memphis
Miami
Milwaukee
Minneapolis
Mobile, Ala
Montgomery, Ala
Muskogee, Ok
Nashville
New Haven, Conn
New Orleans
New York (Brooklyn)
New York (Manhattan)
Newark, NJ
Oklahoma City
Omaha
Oxford, Miss
Pensacola, Fl
Philadelphia
Phoenix
Pittsburgh
Portland, Maine
Portland, Ore
Providence, RI
Raleigh, NC
Roanoke, Va
Sacramento
Salt Lake City
San Antonio
San Diego
San Francisco
Savannah, Ga
Scranton, Pa
Seattle
Shreveport, La
Sioux Falls, SD
South Bend, Ind
Spokane, Wash
Springfield, Ill
St. Louis
Syracuse, NY
Tampa
Topeka, Kan
Tulsa
Tyler, Tex
Washington
Wheeling, WVa
Wilmington, Del