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Table 4: 
An ablation of dependency and constituency parsing results on the validation set with different settings of neural L-PCFG. All models are trained with GloVe word embeddings and without gold tags. “w/ xavier init” means that preterminals are not initialized by clustering centroids by xavier normal distribution. “w/ Factorization N” represents different factorization methods (§5.3.2).
DASUASF1
Neural L-PCFG 35.5 51.4 44.5 
 w/ xavier init 27.2 47.6 43.6 
 w/ Factorization I 16.4 33.3 25.7 
 w/ Factorization II 22.3 42.7 39.6 
 w/ Factorization III 25.9 46.9 34.7 
DASUASF1
Neural L-PCFG 35.5 51.4 44.5 
 w/ xavier init 27.2 47.6 43.6 
 w/ Factorization I 16.4 33.3 25.7 
 w/ Factorization II 22.3 42.7 39.6 
 w/ Factorization III 25.9 46.9 34.7 
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