list the leaders of all the cities through which the 2010 fifa world cup qualification river flows ?
SELECT DISTINCT var_uri where brack_open dbr_2010_FIFA_World_Cup_qualification_ attr_open CONCACAF–CONMEBOL_play-off attr_close dbp_city var_x sep_dot var_x dbo_leaderName var_uri sep_dot var_x a dbo_City brack_close