( Tian Xu 's father Tian Chengsi had been the first military governor of Weibo , but chose Tian Yue to be his successor rather than any of his sons . )
Head entity: tian xu Q7800144 1 2
Tail entity: tian chengsi Q4260397 5 6
Relation (head \u2192 tail): P22
Inverse relation (tail \u2192 head): P40