Before revision:  Hence, to better understand the computational challenge at hand, we consider the more modest task of providing access to only one single answer (i.e., finding the answer at a given position)  .
After revision:  Hence, to better understand the computational challenge at hand, we consider the more modest task of providing access to only one single answer (i.e., finding the answer at a given position) - a task that we refer to as the selection problem .