Extracting Aspects Hierarchies using Rhetorical Structure Theory
Table 2: Coverage values between our Aspect Hierarchical Pairs and ConceptNet Hierarchical Relations.
['[EMPTY]', 'Coverage']
We tested the top 5, 10, 20, 30, 40, and 50 pairs of aspects. We consistently received a coverage level higher than 75% for every subset of our hierarchical aspect pairs. This proves that our unsupervised method generates aspect hierarchies consistent with human-generated relations coded in ConceptNet. Interestingly, all our top 5 aspect pairs were confirmed by ConceptNet relations. Next, the top 10 pairs proved to be 90% correct which is an astonishing result. Moreover, even the top 30, 40 and 50 pairs achieve a coverage level of about 80%.