sentences:  As one of the company's major offerings, the chicken fries are sometimes the center of product advertising for the company.The original advertisements were created by the firm of Crispin, Porter + Bogusky and were the subject of both criticism and legal action by the extreme metal band Slipknot over claims of intellectual property rights, while later advertising programs started the company on new direction of digital-based, multi-media advertising.With the product's North American reintroduction in 2014 and 2015, Burger King utilized a heavy social media campaign to help entice fans of the product back into restaurants.