A Wordnet from the Ground Up

172 Chapter 5. Polish WordNet Today and TomorrowPolysemy rates for plWordNet in comparison to the rates of PWN 3.0 appear inTable 5.3. The adjectival part has not been semi-automatically expanded and representsthe state from the core plWordNet. Both adjectival polysemy rates in plWordNet aresimilar to those of PWN, but it is hard to draw any general conclusions: plWordNet isso much smaller than PWN, and it only underwent a partial semi-automatic expansion.Average number of LUs per one synsetCzech WN Estonian WN French WN German WN plWordNetNouns 1.42 1.64 1.37 1.37 1.36Verbs 1.98 2.12 1.69 1.31 2.42Table 5.4: The average number of LUs per synset in plWordNet and four EWN wordnets (second phase)(Vossen et al., 1999, p. 7).The definition of a synset in plWordNet, based on linguistic criteria (Section 2.1),may – on the face of it – lead to very small synsets, most of them with just one LU.Encouragingly, then, the average number of LUs per synset in the nominal part ofplWordNet is 1.36. This number is very close to those obtained for the three largestEWN wordnets – see Table 5.4. The ratio for verbal synsets in plWordNet is ratherhigh, but that part has been expanded in a small degree. We can expect a decrease inthe ratio of the verbal LUs per synset during later stages of semi-automatic expansion.For the nominal part of plWordNet, the ratio decreased from 3.13 in version 12.2006and 1.36 in the version 1.0.Percentage of synsets including the n LUs [%]1 2 3 4 5 6 7 8 9 ≥ 10Nouns 79.50 12.67 4.22 1.84 0.91 0.34 0.20 0.12 0.07 0.13Verbs 27.31 36.34 19.89 8.39 4.35 1.67 0.97 0.43 0.27 0.38Adjectives 56.90 23.33 11.76 3.84 2.31 0.65 0.60 0.23 0.14 0.24Table 5.5: Synset sizes.In Table 5.5 we take a closer look at the distribution of the synset sizes over thethree parts of plWordNet. Each number in the table shows what percentage of synsetsbelonging to the given part – nominal, verbal, adjectival – is such that they include theparticular number of LUs. For the nominal part, the majority of synsets are singletons,but there is a significant percentage of 2- and 3-element synsets. The numbers graduallydecrease with the increasing n. As a results of plWordNet expansion, many new nonsingletonsynsets were created or complemented with new LUs.The largest existing nominal synset includes emotionally marked nominal LUs:{głupiec ‘fool’, głąb ‘noodle’, baran ‘blockhead’, osioł‘donkey’, gamoń ‘nincompoop’, matoł ‘nitwit’, ćwierćinteligent