The results obtained in previous works relying on semantic classes are above ours (around 0.82 for (Brill and Resnik, 1994) and 0.77 for (Lauer and Dras, 1994)), but a direct comparison is difficult inasmuch as only three-word sequences (V N P, for (Brill and Resnik, 1994) and N N N for (Lauer and Dras, 1994)) were used for evaluation in those works, and the language studied is English.
it may well be the case that the semantic resource we use does not compare well, in terms of coverage and homogeneity, with WordNet, the semantic resource usually used.