1. A method comprising: identifying a sentence; identifying a graph of generalized constituents of the sentence based on rough syntactic analysis of a lexical-morphological structure of the sentence, wherein the graph of generalized constituents comprises arcs and nodes, wherein each of the nodes represents a constituent of the sentence comprising one or more words in the sentence that function as a unit within the sentence, and wherein each of the arcs between a pair of the nodes represents a syntactic slot expressing a type of relationship between lexical values of the pair; filtering, by a data processing apparatus, the arcs of the graph of generalized constituents using a combination classifier comprising a tree classifier and at least one linear classifier, wherein the tree classifier divides the arcs into clusters based on a predetermined set of symbolic features, and wherein the linear classifier filters the clusters of the arcs based on combinations of numerical features for each of the clusters; and identifying, by the data processing apparatus, a syntactic structure of the sentence by performing precise syntactic analysis of the sentence based on the graph of generalized constituents of the sentence with the filtered clusters of the arcs.
4. The method of claim 1 , wherein the predetermined set of symbolic features is based on parallel analysis of a two-language text corpus.