Complex sentence: Andronikos IV was also given the city of Selymbria (Silivri) as his personal domain, however he predeceased his father here in 1385, never to rule as legitimate emperor.
Split into simpler sentences: Andronikos IV was also given the city of Selymbria (Silivri) as his personal domain. However, he predeceased his father there in 1385, never to rule as legitimate emperor.