The relations contained in the user-specified knowledge are used in one of the last sieves of the algorithm. It looks for constructions where one mention is (a) a possessive, demonstrative or relative pronoun used as an attribute, (b) a genitive or (c) preceded by a token ’von’ which means that one mention is a prepositional modifier of another, like ‘seine Ehefrau’, ‘Richards Ehefrau’ or ‘Ehefrau von Richard’. These constructions can be used if the first mention belongs to a character and this character has a relation that has the text of the second mention as a possible label (in our example, the character ‘Richard’ needs a relation that contains the label ‘Ehefrau’). If this is the case, it can be determined that the second mention (‘Ehefrau’ in the example) belongs to the character which is the target of the relation. The cluster of the second mention is therefore merged into another cluster which has previously been identified to belong to the target character (ideally, there should only be one such cluster left by the time this sieve is applied).