what is the source country of desaguadero river is also the land of colegio san agustín ?
SELECT DISTINCT var_uri where brack_open dbr_Desaguadero_River_ attr_open Bolivia attr_close dbp_sourceCountry var_uri sep_dot dbr_Colegio_San_Agustín_ attr_open Cochabamba attr_close dbo_country var_uri brack_close