MIT Press

Table 1

The oracle best accuracy scores of unlabeled parse evaluation of different systems on synthetic data.

System	Recall	Precision	F1	RH
Seginer (2007a)	0.71	0.83	0.77	–
Ponvert, Baldridge, and Erk (2011)	0.81	0.91	0.86	–
Shain et al. (2016)	0.38	0.38	0.38	–
Kim, Dyer, and Rush (2019) without z	0.73	0.73	0.73	0.73
Kim, Dyer, and Rush (2019) with z	0.73	0.73	0.73	0.73

Unbounded PCFG §3	1.00	1.00	1.00	1.00

System	Recall	Precision	F1	RH
Seginer (2007a)	0.71	0.83	0.77	–
Ponvert, Baldridge, and Erk (2011)	0.81	0.91	0.86	–
Shain et al. (2016)	0.38	0.38	0.38	–
Kim, Dyer, and Rush (2019) without z	0.73	0.73	0.73	0.73
Kim, Dyer, and Rush (2019) with z	0.73	0.73	0.73	0.73

Unbounded PCFG §3	1.00	1.00	1.00	1.00