a factor with levels Band-Aid,
Barbie, Birds Eye, Budweiser, Camel, Campbell,
Carlsberg, Coca-Cola, Colgate, Del Monte,
Fisher-Price, Gordon's, Green Giant, Guinness,
Haagen-Dazs, Heineken, Heinz, Hennessy,
Hermes, Hershey, Ivory, Jell-o, Johnnie
Walker, Kellogg, Kleenex, Kraft, Louis Vuitton,
Marlboro, Nescafe, Nestle, Nivea, Oil of Olay,
Pampers, Pepsi-Cola, Planters, Quaker, Sara
Lee, Schweppes, Smirnoff, Tampax, Winston, and
Wrigley's