10 As shown in Figure 8, the more dispersed (less closely clustered together) a set of nodes is, the further away their common ancestor is.
a highly related (and spatially constrained) set of concept nodes can be generalized to a more specific ancestor concept (i.e., near the descendants, as in Figure 8(b)), whereas a semantically distant set of concepts will be generalized to a semantically general ancestor concept (i.e., far from the descendants, as in Figure 8(a)).