Complex sentence: Services operated under the "screw concept", trains entered the ring from the south at Neukölln and circled around it one and the half times, at the time the trip around the ring could not be achieved in less than 63 minutes.
Split into simpler sentences: Services operated under the "screw concept": trains entered the ring from the south at Neukölln and circled around it one and a half times. At the time the trip around the ring could not be achieved in less than 63 minutes.