1. A computer system providing an answer to at least one analytical question containing at least one table or at least one chart, the computer system comprising: one or more processors, one or more computer-readable memories, one or more computer-readable tangible storage devices, and program instructions stored on at least one of the one or more storage devices for execution by at least one of the one or more processors via at least one of the one or more memories, wherein the computer system is capable of performing a method comprising: receiving an input question containing at least one table or at least one chart, wherein the received input question is entered via a graphical user interface associated with a computer and the received input question is associated with the at least one analytical question; extracting, by the computer, a plurality of information from the input question based on a natural language analysis of the input question; forming a well-defined statement based on the extracted plurality of information; extracting, by the computer, the at least one table or at least one chart associated with the input question; extracting, by the computer, a plurality of information from the extracted at least one table or at least one chart, wherein the extracted plurality of information comprises a data value, a data label, a header, a footer, a legend, an overlay, a unit, a line, an edge, a contour, a shape, a length, a proportion, and an angle; forming at least one mathematical equation based on the well-defined statement and the extracted plurality of information from the extracted at least one table or at least one chart; solving the at least one mathematical equation; determining the answer to the input question in natural language based on the solved at least one mathematical equation; and narrating the determined answer to the input question in natural language, wherein narrating the determined answer to the input question comprises displaying the determined answer to the input question via the graphical user interface.