Transforming Dependencies into Phrase Structures
نویسندگان
چکیده
PTB 23 Model F1 Sent./s. Charniak (2000) 89.5 Stanford PCFG (2003) 85.5 5.3 Petrov (2007) 90.1 8.6 Zhu (2013) 90.3 39.0 Carreras (008) 91.1 CJ Reranking (2005) 91.5 4.3 Stanford RNN (2013) 90.0 2.8 PAD 90.6 34.3 PAD (Pruned) 90.5 58.6 CTB 5 Model F1 Charniak (2000) 80.8 Bikel (2004) 80.6 Petrov (2007) 83.3 Zhu (2013) 83.2 PAD 82.4 Experiments Contributions • A phrase-structure parser (PAD) achieves 0.4% higher f-score on the Penn Treebank and ~7x faster than the Berkeley parser, without reranking or semisupervised training. • An linear observable time algorithm for transforming dependency parse trees into phrase-structure parse trees.
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