<prompt> Pedzisa mutsara unotevera: Mienzaniso inokosha yokutanga ine mativi maviri inosanganisira mepu yokuyerera kweNapoleons March paMoscow yakabudiswa naCharles Joseph Minard muna 1869; coxcombs yakashandiswa naFlorence Nightingale muna 1857 sechikamu chemushandirapamwe wekuvandudza mamiriro ehutsanana muuto reBritain; uye mepu yemadontho yakashandiswa naJohn Snow muna 1855 kuenzanisira kufamba kwaNapoleon paMoscow; uye coxcombs yakashandiswa naFlorence Nightingale muna 1857 sechikamu chemushandirapamwe wekuvandudza mamiriro ehutsanana muuto reBritain; uye mepu yemadontho yakashandiswa naJohn Snow muna 1855 kuenzanisira kufamba kwaNapoleon paMoscow.  <response>: Kupararira kwecholera muBroad Street. 