Complex sentence: Lucy Schildkret Dawidowicz (June 16,1915--December 5,1990) was an American historian and an author of books on modern Jewish history, in particular books on the Holocaust.
Split into simpler sentences: Lucy Schildkret Dawidowicz (June 16,1915--December 5,1990) was an American historian and author. She wrote books on modern Jewish history, in particular books on the Holocaust.