Table: german_afghan_casualties
Columns: date
location
nature_of_incident
circumstances
casualties

Question: When was the location 15km NW of Pol-E Khomri, the circumstaances IED and the casualties of 1 WIA?
SQL: SELECT "date" FROM german_afghan_casualties WHERE "casualties" = '1 wia' AND "circumstances" = 'ied' AND "location" = '15km nw of pol-e khomri'

Question: When was the incident in Pol-E Khomri?
SQL: SELECT "date" FROM german_afghan_casualties WHERE "location" = 'pol-e khomri'

Question: What was the incident in imam sahib area, kunduz province?
SQL: SELECT "nature_of_incident" FROM german_afghan_casualties WHERE "location" = 'imam sahib area, kunduz province'