<prompt> Bhala okuqhubekayo kwalesi sigaba - Ngesikhathi sokubhala kuka-de Brazza, inani lamamumi eVenzone lalibalwa ngama-42. Ngemva kokuzamazama komhlaba kule ndawo ngo-1976  <response>: Kusukela ngo-1990, inani liye lancishiswa laba ngu-15. Ngokuqondakalayo, ukwehla kwenani lazo kuye kwenza kwaba nzima kakhulu ukutadisha ngokunembile ukuthi zaziyini ngempela izimo ezabangela ukuba zenziwe izidumbu. Njengoba uprofesa waseNyuvesi yaseMinnesota u-Arthur C. Aufderheide elandisa, nakuba umphakathi waseVenzone ungase ube nomoya wokungenisa izihambi ongakholeki, labo abanegunya phezu kwezidumbu baye benqaba ngisho no-Aufderheide ngokwakhe ukuba athathe amasampula ukuze ahlolwe. Lokhu kusho ukuthi namuhla ngokuvamile kungasetshenziswa kuphela amasiko aseqoqiwe kakade ekuhlaziyeni ukuthi yiziphi izimo okungenzeka zabangela ukulondolozwa kwesidumbu. 