which source of desaguadero river is also the nation of the la virgen de las siete calles ?
SELECT DISTINCT var_uri where brack_open dbr_Desaguadero_River_ attr_open Bolivia attr_close dbp_sourceCountry var_uri sep_dot dbr_La_Virgen_de_las_Siete_Calles_ attr_open TV_series attr_close dbo_country var_uri brack_close