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Table 15

Impact of nested mentions on the system performance for the Chinese development set.

Nested Mentions	MUC			B³			CEAF_e			Mean
Nested Mentions	R	P	F₁	R	P	F₁	R	P	F₁	Mean
Yes	60.35	70.56	65.05	67.37	79.49	72.93	55.15	44.94	49.52	62.50
No	54.40	68.19	60.52	64.17	78.84	70.76	51.42	38.96	44.33	58.54

Nested Mentions	MUC			B³			CEAF_e			Mean
Nested Mentions	R	P	F₁	R	P	F₁	R	P	F₁	Mean
Yes	60.35	70.56	65.05	67.37	79.49	72.93	55.15	44.94	49.52	62.50
No	54.40	68.19	60.52	64.17	78.84	70.76	51.42	38.96	44.33	58.54