what is the military unit whose command structures are 2nd belorussian front and 1st belorussian front ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_commandStructure dbr_2nd_Belorussian_Front sep_dot var_uri dbo_commandStructure dbr_1st_Belorussian_Front sep_dot var_uri a dbo_MilitaryUnit brack_close