Complex sentence: On the night of 15--16 October 2016, Ladenburger attended a party hosted by the university medical faculty, which she left at 2:37 a.m., returning homewards by bike.
Split into simpler sentences: On the night of 15--16 October 2016, Ladenburger attended a party hosted by the university medical faculty. She left the party at 2:37 a.m., returning homewards by bike.