41. The method of claim 40 , wherein ranking the graph nodes comprises sorting the sentences in reverse order based upon the second plurality of scores.
40. The method of claim 32 , wherein ranking the plurality of graph nodes comprises: assigning a plurality of first scores to the plurality of graph nodes; defining a relationship between a second score of each graph node and second scores of graph nodes coupled each graph node by a graph edge; and determining a plurality of second scores associated with the plurality of graph nodes by applying an iterative recursive algorithm starting with the plurality of first scores and iterating until the relationship is satisfied.