Consider the following database schema and example instance: recipe name Pasta and Meatballs Cheese Soup Burger inventor Le cook The french Cowboys kitchen Italian French American ingredient recipe foodItem Pasta and Meatballs Pasta Pasta and Meatballs Meatballs Pasta and Meatballs Tomato Sauce Pasta and Meatballs Onions Cheese Soup Onions Cheese Soup Cheese Cheese Soup Bread Burger Bread Burger Ground Beef ounces 50 10 5 1 4 15 20 10 20 foodItem item type Pasta Wheat product Meatballs Meat Tomato Sauce Sauce Onions Vegetables Cheese Diary Bread Wheat product Ground Beef Meat calories 20 40 5 1 30 25 45 foodItem Pasta Meatballs Tomato Sauce Tomato Sauce Cheese stock shop Aldi Aldi Aldi Walmart Treasury Island price 5 10 3 3 15 Write a relational algebra expression that returns the food items that are ingredients for "Cheese Soup" but not for "Burgers