On 15 March 963 , Emperor Romanos II ( r. 959–963 ) unexpectedly died , leaving his young sons Basil II and Constantine VIII as emperors .
Head entity: basil ii Q41833 19 20
Tail entity: romanos ii Q41847 6 7
Relation (head \u2192 tail): P40
Inverse relation (tail \u2192 head): P22