Complex sentence: The New Hospital for Women developed from St Mary's Dispensary in the 1870s, a London institution founded to enable poor women to obtain medical help from qualified female practitioners-in that era a very unusual thing.
Split into simpler sentences: The New Hospital for Women developed from St Mary's Dispensary in the 1870s. It was founded to enable poor women to obtain medical help from qualified female practitioners-in that era a very unusual thing.