who is the youngest player in the first league of the federation of bosnia and herzegovina ?
select distinct var_uri where brack_open var_uri dbo_team var_x sep_dot var_x dbo_league dbr_First_League_of_the_Federation_of_Bosnia_and_Herzegovina sep_dot var_uri dbo_birthDate var_y sep_dot brack_close _obd_ var_y offset 0 limit 1