How to formulate a research topic out of a broad research interest? 

Hi mates
I am in the course of pursuing my Masters degree in Anthropology, and now in the second year I am required to submit a proposal, even though my university has briefed us about the particulars regarding the proposal, but I have not been able to chisel out my research topic, my research interest lies in exploring the Gond shrines of Maharashtra located in three different locations (in Maharashtra), the increasing mobilization of Gondi tribe around these areas. Since there are different motives that inform the establishment and reification of these three shrines, it has left me confused as to which strand of it should I go ahead to pursue. I welcome any sort of suggestions.