who is starring in canada movies produced by steven silver ?
select distinct var_uri where brack_open var_film rdf_type dbo_Film sep_dot var_film dbo_country dbr_Canada sep_dot var_film dbo_producer dbr_Steven_Silver_ attr_open film_director attr_close sep_dot var_film dbo_starring var_uri sep_dot var_uri rdf_type dbo_Person sep_dot brack_close