Question: What is the cause of death of Sigebert Ii's father?
Sentence (from "Theuderic II"): Theuderic died of dysentery in his Austrasian capital of Metz in late 613 while preparing a campaign against his longtime enemy, Clotaire, who had, based on a treaty with Theuderic during the last fraternal war, retaken the duchy of Dentelin.
Relevant evidence: Yes