Task: Question Generation
Input (English): Context : On their retreat through northern Italy, they were intercepted and defeated in the battle of Mediolanum (near present-day Milan) by Gallienus' army, which had advanced from Gaul, or from the Balkans after dealing with the Franks. 
Subject : Gallienus 
Relation : spouse
Output (English): What is Gallienus's spouse's name?