Task: Question Understanding
Input (English): Context : 1985 Bakhtar Afghan Airlines Antonov An-26 shootdown was on 4 September 1985 when a Bakhtar Afghan Airlines Antonov An-26 (registered in Afghanistan as YA-BAM) on a scheduled internal flight from Kandahar to Farah was shot down by a ground-to-air missile. 
Question : The point in time of 1985 Bakhtar Afghan Airlines Antonov An-26 shootdown was what?
Output (English): point in time