1. A method of processing at least one natural language text using a graph, comprising: determining a plurality of text units based upon the natural language text; associating the plurality of text units with a plurality of graph nodes; determining at least one connecting relation between at least two of the plurality of text units; associating the at least one connecting relation with at least one graph edge connecting at least two of the plurality of graph nodes; and determining at least one ranking based on at least one of the plurality of graph nodes and the at least one graph edge.