<prompt> Tšweletša phetolelo e raraganego ya polelo ye e latelwago ka 1987 ke go ngwadišwa go Zurich Stock Exchange.  <response>: Ee, phetolelo e raraganego kudu ya polelo ke Go ngwadišwa ka Zurich stock exchange go latetše ka 1987, gomme bašomi ka moka ba amogetše dišere ka khamphaning. 