Paper: Better Arabic Parsing: Baselines Evaluations and Analysis

ACL ID C10-1045
Title Better Arabic Parsing: Baselines Evaluations and Analysis
Venue International Conference on Computational Linguistics
Session Main Conference
Year 2010
Authors

In this paper, we offer broad insight into the underperformance of Arabic con- stituency parsing by analyzing the inter- play of linguistic phenomena, annotation choices, and model design. First, we iden- tify sources of syntactic ambiguity under- studied in the existing parsing literature. Second, we show that although the Penn Arabic Treebank is similar to other tree- banks in gross statistical terms, annotation consistency remains problematic. Third, we develop a human interpretable gram- mar that is competitive with a latent vari- able PCFG. Fourth, we show how to build better models for three different parsers. Finally, we show that in application set- tings, the absence of gold segmentation lowers parsing performance by 2–5% F1.