Complex sentence: During World War II it served as the headquarters of the German military high command in France during the Nazi occupation of Paris and played a pivotal role in the deportation of Parisian Jews and the 1944 assassination attempt on Hitler.
Split into simpler sentences: During World War II it served as the headquarters of the German military high command in France during the Nazi occupation of Paris. The hotel played a pivotal role in the deportation of Parisian Jews and the 1944 assassination attempt on Hitler.