name all the soccer players who played in a under 18 club for nemzeti bajnokság i ?
SELECT DISTINCT var_uri where brack_open var_x dbp_league dbr_Nemzeti_Bajnokság_I_ attr_open men's_handball attr_close sep_dot var_uri dbp_youthclubs var_x sep_dot var_uri a dbo_SoccerPlayer brack_close