Complex sentence: She was also active in the theatre, including "Romeo and Juliet" at the Old Vic and "A Streetcar Named Desire", in London throughout World War II, even as Nazis were bombing the city.
Split into simpler sentences: She was also active in the theatre, including "Romeo and Juliet" at the Old Vic and "A Streetcar Named Desire". She performed in London throughout World War II, even as Nazis were bombing the city.