A problem at this stage is to identify the correct subject domain, that is, the most relevant clusters found
in Step 1.4 w.r.t. the ontology. Therefore, we compute the similarity between the cluster feature vectors
of an entity with the CLFVs of the neighbouring entities, i.e., parents, children, and other entities. In
order to find the most prominent cluster, an entity must have at least one neighbour otherwise this check
will fail.