Embodiments of the present invention will now be described by way of example with reference to the accompanying drawings, in which:
FIG. 1 shows an example of a cluster obtained in accordance with an embodiment of the present invention;
FIG. 2 shows a cluster as portrayed by its annotated parse tree;
FIG. 3 shows a cluster as portrayed graphically by way of a parse map; and,
FIG. 4 shows another example of portrayal of clusters.