On the last day before winter break at the selective Edison Regional Gifted Center school in Albany Park, 13-year-old Katelyn Carlson died after going into anaphylactic shock in school. The cause: Chinese food ordered as a celebration for her class.Now, ABC reports, the Carlson family is suing the restaurant that provided the food, the Chinese Inn in Niles, for using peanuts in its preparation despite explicit requests not to.According to the lawsuit, Chicago Public Schools officials were aware of Katelyn's acute allergy to peanuts.