Ƙirƙirar wani nau'i mai mahimmanci na wannan jumla Kogin ya fara ne a matsayin Agra Oya, a cikin Horton Plains a cikin Tsakiyar Tsakiya.
Tabbas, wani nau'i mai rikitarwa na jumla shine "Kogin ya fara ne a matsayin Agra Oya, a cikin Horton Plains a cikin Highlands na Tsakiya wanda ke da ruwan sama na shekara-shekara tsakanin 125 da 200 inci a shekara. "