list the developers who has contributed to both doña bárbara and doña bárbara ?
SELECT DISTINCT var_uri where brack_open dbr_Doña_Bárbara_ attr_open 2008_telenovela attr_close dbo_developer var_uri sep_dot dbr_Doña_Bárbara_ attr_open 2008_telenovela attr_close dbo_developer var_uri brack_close