<prompt> Bhala okuqhubekayo kwalesi sigaba - Udokotela waseBrithani uJohn Snow wasebenzisa umdwebo ofana nokaVoronoi ngo-1854 ukuze abonise indlela iningi labantu elafa ngayo ekuqubukeni kwesifo sekholera eBroad Street  <response>: yayihlala eduze kwepompo yamanzi eseBroad Street enegciwane kunanoma iyiphi enye ipompo yamanzi. 