Table 8.

Performance of ten-fold cross-validation decision tree methods with various feature sets on identifying direct evidence instances.

	TP	FP	FN	TN	Prec.(%)	Rec.(%)	F1(%)	Acc.(%)
Baseline features [11]	131	88	80	58	59.82	62.09	60.93	52.94
All rules features	149	102	62	44	59.36	70.62	64.50	54.06
Original combined features	175	121	36	25	59.12	82.94	69.03	56.02
Combined features	185	122	26	24	60.26	87.68	71.43	58.54