Complex sentence: Dorsey died in the St. Charles Hotel in New Orleans on July 4,1879, at the age of fifty, following an unsuccessful operation for cancer performed by Dr. T. G. Richardson, assisted by Dr. Rudolph Matas.
Split into simpler sentences: Dorsey died in the St. Charles Hotel in New Orleans on July 4,1879, at the age of fifty. She had undergone an unsuccessful operation for cancer performed by Dr. T. G. Richardson, assisted by Dr. Rudolph Matas.