sentences:  [Notes 5]
  
  Burger King and its Australian franchise Hungry Jack's have introduced a variety of grilled chicken sandwiches to its products portfolio since 1990.The BK Broiler was the first iteration, and was one of the most successful product introductions in the fast food industry to that point in time.However sales dropped in the following two years, and the product was reformulated and renamed to the Chicken Whopper to align the product with the company's Whopper Sandwich.