Complex sentence: Pauline Gregg (July 17,1909--March 11,2006) was a British historian whose published works are concentrated upon the period of the English Civil Wars of the 17th century and the history of social life in Britain.
Split into simpler sentences: Pauline Gregg (July 17,1909--March 11,2006) was a British historian. Her published works concentrated on the period of the English Civil Wars of the 17th century and the history of social life in Britain.