what is the river that falls into castejón de las armas and castejón de las armas ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_riverMouth dbr_Castejón_de_las_Armas sep_dot var_uri dbo_riverMouth dbr_Castejón_de_las_Armas sep_dot var_uri a dbo_River brack_close