1. A computer-implemented method for generating superunits from a concept network, the concept network including a plurality of units and a plurality of relationships defined between pairs of the plurality of units, wherein each relationship has an associated edge weight, the method comprising the acts of: identifying a superunit seed comprising at least one member unit, wherein each member unit is one of the plurality of units of the concept network; defining a signature for the superunit seed, the signature including one or more signature units, wherein each signature unit has a relationship in the concept network with at least a minimum number of the member units; expanding the superunit seed by adding one or more new member units from the concept network, wherein each new member unit satisfies a match criterion based on the signature; modifying the signature based on the expanded superunit seed; repeating the acts of expanding and modifying until a convergence criterion is satisfied, wherein a final superunit and a final signature are formed once the convergence criterion is satisfied; and storing superunit membership information for each member unit of the final superunit.