Input (grade 12): A cheesesteak, also known as a Philadelphia cheesesteak, Philly cheesesteak, or steak and cheese, is a sandwich made from thinly sliced pieces of steak and melted cheese in a long roll.
Output (grade 6): A cheesesteak is a sandwich invented in Philadelphia. It is made of a long roll, cut in half and filled with thin slices of steak and covered with melted cheese.