what is the military conflict whose commanders are gian galeazzo visconti and gian galeazzo visconti ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_commander dbr_Gian_Galeazzo_Visconti sep_dot var_uri dbo_commander dbr_Gian_Galeazzo_Visconti sep_dot var_uri a dbo_MilitaryConflict brack_close