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| Content Provider | ACM Digital Library |
|---|---|
| Author | Wen, Ji-Rong Zhu, Jun Nie, Zaiqing Liu, Xiaojiang Zhang, Bo |
| Abstract | Traditional relation extraction methods require pre-specified relations and relation-specific human-tagged examples. Bootstrapping systems significantly reduce the number of training examples, but they usually apply heuristic-based methods to combine a set of strict hard rules, which limit the ability to generalize and thus generate a low recall. Furthermore, existing bootstrapping methods do not perform open information extraction (Open IE), which can identify various types of relations without requiring pre-specifications. In this paper, we propose a statistical extraction framework called Statistical Snowball (StatSnowball), which is a bootstrapping system and can perform both traditional relation extraction and Open IE. StatSnowball uses the discriminative Markov logic networks (MLNs) and softens hard rules by learning their weights in a maximum likelihood estimate sense. MLN is a general model, and can be configured to perform different levels of relation extraction. In StatSnwoball, pattern selection is performed by solving an $l_{1}-norm$ penalized maximum likelihood estimation, which enjoys well-founded theories and efficient solvers. We extensively evaluate the performance of StatSnowball in different configurations on both a small but fully labeled data set and large-scale Web data. Empirical results show that StatSnowball can achieve a significantly higher recall without sacrificing the high precision during iterations with a small number of seeds, and the joint inference of MLN can improve the performance. Finally, StatSnowball is efficient and we have developed a working entity relation search engine called Renlifang based on it. |
| Starting Page | 101 |
| Ending Page | 110 |
| Page Count | 10 |
| File Format | |
| ISBN | 9781605584874 |
| DOI | 10.1145/1526709.1526724 |
| Language | English |
| Publisher | Association for Computing Machinery (ACM) |
| Publisher Date | 2009-04-20 |
| Publisher Place | New York |
| Access Restriction | Subscribed |
| Subject Keyword | Statistical models Markov logic networks Relationship extraction |
| Content Type | Text |
| Resource Type | Article |
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