sentences:  It claimed between 96 and 98 lives and caused 140 injuries.It is the most catastrophic hotel fire in Puerto Rican history and the second deadliest in the history of the United States.The Dupont Plaza opened in 1963 as the Puerto Rico-Sheraton and was operated by the Sheraton hotel company until 1980, just before Sheraton imposed significant fire-safety measures in its hotels throughout the world.