Complex sentence: The Rosenstrasse protest was a nonviolent protest in Rosenstraße ("Rose street ") in Berlin in February and March 1943, carried out by the non-Jewish ("Aryan") wives and relatives of Jewish men who had been arrested for deportation.
Split into simpler sentences: The Rosenstrasse protest was a collective street protest on Rosenstraße ("Rose street ") in Berlin during February and March 1943. It was initiated and sustained by the non-Jewish ("Aryan") wives and relatives of Jewish men who had been arrested for deportation.