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Feature-Rich Part-of-Speech Tagging with a Cyclic Dependency Network
A new part-of-speech tagger is presented that demonstrates the following ideas: explicit use of both preceding and following tag contexts via a dependency network representation, broad use of lexical features, and effective use of priors in conditional loglinear models. Expand
Accurate Unlexicalized Parsing
We demonstrate that an unlexicalized PCFG can parse much more accurately than previously shown, by making use of simple, linguistically motivated state splits, which break down false independenceExpand
Learning Accurate, Compact, and Interpretable Tree Annotation
We present an automatic approach to tree annotation in which basic nonterminal symbols are alternately split and merged to maximize the likelihood of a training treebank. Starting with a simple X-barExpand
Corpus-Based Induction of Syntactic Structure: Models of Dependency and Constituency
This work presents a generative model for the unsupervised learning of dependency structures and describes the multiplicative combination of this dependency model with a model of linear constituency that works and is robust cross-linguistically. Expand
Neural Module Networks
A procedure for constructing and learning neural module networks, which compose collections of jointly-trained neural "modules" into deep networks for question answering, and uses these structures to dynamically instantiate modular networks (with reusable components for recognizing dogs, classifying colors, etc.). Expand
Alignment by Agreement
We present an unsupervised approach to symmetric word alignment in which two simple asymmetric models are trained jointly to maximize a combination of data likelihood and agreement between theExpand
Speaker-Follower Models for Vision-and-Language Navigation
Experiments show that all three components of this approach---speaker-driven data augmentation, pragmatic reasoning and panoramic action space---dramatically improve the performance of a baseline instruction follower, more than doubling the success rate over the best existing approach on a standard benchmark. Expand
Improved Inference for Unlexicalized Parsing
A novel coarse-to-fine method in which a grammar’s own hierarchical projections are used for incremental pruning, including a method for efficiently computing projections of a grammar without a treebank is presented. Expand
Learning Dependency-Based Compositional Semantics
A new semantic formalism, dependency-based compositional semantics (DCS) is developed and a log-linear distribution over DCS logical forms is defined and it is shown that the system obtains comparable accuracies to even state-of-the-art systems that do require annotated logical forms. Expand
Fast Exact Inference with a Factored Model for Natural Language Parsing
A novel generative model for natural language tree structures in which semantic and syntactic structures are scored with separate models that admits an extremely effective A* parsing algorithm, which enables efficient, exact inference. Expand