A Wordnet from the Ground Up

160 Chapter 4. Extracting Relation InstancesFigure 4.13:WNW’s accurate suggestion, and one indirectly related to a informal sense, for dzięcioł‘woodpecker’; the informal sense is ‘one who cons (habitually learns by heart)’. Glosses:ptak ‘bird’, kuropatwa ‘partridge’, ptak drapieżny ‘carnivore bird’, jaskółka ‘swallow’, jastrząb‘hawk’, sikorka ‘tit, chikadee; informally: adolescent girl’, dziewczyna ‘girl’Attachment errors were mostly caused by text preprocessing or by the AAA algorithmitself. Since plWordNet is still very much under development, a wrong attachmentcan be caused by a flaw in the wordnet structure. In order to distinguish among severaldifferent causes, we asked the linguist to try to identify the possible cause for everywrong attachment. Eight cause types include a missing hypernym or substructure,a duplicated synset or a wrong synset element.Precision and recall calculated for the recorded decisions appear in Table 4.5.Precision was calculated in relation to• different acceptable distances: P 1 – exact attachment to the local maximumsynset (by synonymy or hyponymy) versus P H – at any distance accessible bylinks in a given subgraph,• acceptable types of links: P H+M – meronymic links are counted as positive too,because they also are in the linguist’s focus,