Question: Who is Apa Qaghan's paternal grandfather?
Sentence (from "Apa Qaghan"): ābō kěhàn, Wade-Giles: a-po k'o-han, Middle Chinese: (Guangyun) , personal name: 大邏便/大逻便, dàluóbiàn, ta-lo-pien, reigned: 581–587)
Relevant evidence: No