Question: Who is the paternal grandfather of Tulan Qaghan?
Sentence (from "Ishbara Qaghan"): Ishbara Qaghan (Old Turkic: 𐰃𐱁𐰉𐰺𐰀𐰴𐰍𐰣, Ϊšbara qaγan, 沙缽略可汗/沙钵略可汗, Pinyin: shābōlüè kěhàn,
Relevant evidence: No