name the military conflict whose commander was hermann kövess von kövessháza and took place in kingdom of serbia ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_commander dbr_Hermann_Kövess_von_Kövessháza sep_dot var_uri dbo_place dbr_Kingdom_of_Serbia sep_dot var_uri a dbo_MilitaryConflict brack_close