what is the military conflict whose commanders are andronikos iv palaiologos and manuel ii palaiologos ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_commander dbr_Andronikos_IV_Palaiologos sep_dot var_uri dbo_commander dbr_Manuel_II_Palaiologos sep_dot var_uri a dbo_MilitaryConflict brack_close