Complex sentence: Its mission was to hunt down and annihilate Jews, Gypsies, Communists, and other "undesirables": by winter 1941, Stahlecker reported to Berlin that Einsatzgruppe A had murdered some 249,420 Jews.
Split into simpler sentences: Its mission was to hunt down and annihilate Jews, Gypsies, Communists, and other "undesirables". By winter 1941, Stahlecker reported to Berlin that Einsatzgruppe A had murdered some 249,420 Jews.