1. A method comprising: creating submodels comprising lexical structure weights that are assigned to a lexical structure, the submodels including an individual submodel that comprises an individual lexical structure weight that is assigned to the lexical structure; and assigning, as an input to the individual submodel, a lexical unit weight that is assigned to an individual lexical unit of the lexical structure, wherein the individual submodel performs an operation on the individual lexical structure weight assigned to the lexical structure and the lexical unit weight assigned to the individual lexical unit.