Fast and Robust Multilingual Dependency Parsing with a Generative Latent Variable Model

We use a generative history-based model to predict the most likely derivation of a dependency parse. Our probabilistic model is based on Incremental Sigmoid Belief Networks, a recently proposed class of latent variable models for structure prediction. Their ability to automatically induce features results in multilingual parsing which is robust enough to achieve accuracy well above the average for each individual language in the multilingual track of the CoNLL-2007 shared task. This robustness led to the third best overall average labeled attachment score in the task, despite using no discriminative methods. We also demonstrate that the parser is quite fast, and can provide even faster parsing times without much loss of accuracy.

• Type: Conference
• Year: 2007
• Where: EMNLP
• Authors: Ivan Titov, James Henderson
• Keywords: EMNLP 2007, Generative History-based Model, Incremental Sigmoid Belief, Latent Variable Models, Natural Language Processing