Abstract | When ConceptResolver is run on N ELL’s knowledge base , 87% of the word senses it creates correspond to real-world concepts, and 85% of noun phrases that it suggests refer to the same concept are indeed synonyms. |
Background: Never-Ending Language Learner | 1More information about NELL, including browsable and downloadable versions of its knowledge base , is available from http://rtw.ml.cmu.edu. |
Background: Never-Ending Language Learner | NELL’s knowledge base contains both definitions for predicates and extracted instances of each predicate. |
Background: Never-Ending Language Learner | At present, NELL’s knowledge base defines approximately 500 predicates and contains over half a million extracted instances of these predicates with an accuracy of approximately 0.85. |
ConceptResolver | The final output of sense induction is a sense-disambiguated knowledge base , where each noun phrase has been converted into one or more word senses, and relations hold between pairs of senses. |
Evaluation | For both experiments, we used a knowledge base created by running 140 iterations of NELL. |
Introduction | Many information extraction systems construct knowledge bases by extracting structured assertions from free text (e.g., NELL (Carlson et al., 2010), TextRunner (Banko et al., 2007)). |
Introduction | It first performs word sense induction, using the extracted category instances to create one or more unambiguous word senses for each noun phrase in the knowledge base . |
Introduction | We evaluate ConceptResolver using a subset of NELL’s knowledge base , presenting separate results for the concepts of each semantic type. |
Association Model | Clicked results in a vertical search engine are edges between queries and entities e in the vertical’s knowledge base . |
Association Model | Throughout our models, we make the simplifying assumption that the knowledge base E is complete. |
Introduction | In this paper, we focus instead on associating surface contexts with entities that refer to a particular entry in a knowledge base such as Freebase, IMDB, Amazon’s product catalog, or The Library of Congress. |