Complex sentence: Hitler summons General Robert Ritter von Greim and his mistress, ace pilot Hanna Reitsch to the bunker and appoints von Greim Commander-in-Chief of the Luftwaffe.
Split into simpler sentences: Hitler summons General Robert Ritter von Greim and his mistress, ace pilot Hanna Reitsch, to the bunker. He appoints von Greim Commander-in-Chief of the Luftwaffe.