Task: Question Generation
Input (English): Context : Operation Neretva '93 was an Army of the Republic of Bosnia and Herzegovina (ARBiH) operation against the Croatian Defence Council (HVO) in September 1993 on a 200 km long front from Gornji Vakuf to south of Mostar, one of its largest of the year, on areas which were included in the Croatian Republic of Herzeg-Bosnia. 
Subject : Operation Neretva '93 
Relation : point in time
Output (English): The point in time of Operation Neretva '93 was when?