Complex sentence: The concept of hospice as a place to treat the incurably ill has been evolving since the 11th century and came into the United States in the 1970s in response to the work of Cicely Saunders in the United Kingdom.
Split into simpler sentences: The concept of hospice as a place to treat the incurably ill has been evolving since the 11th century. Hospice care was introduced to the United States in the 1970s in response to the work of Cicely Saunders in the United Kingdom.