Table 7. Comparing feature extraction performance by using different sets of rules.

Datasets	Rules from previous studies			This study
	Precision	Recall	F-Measure	Precision	Recall	F-Measure
D1	0.88	0.85	0.87	0.94	0.91	0.92
D2	0.82	0.80	0.81	0.92	0.92	0.92
D3	0.90	0.87	0.89	0.94	0.91	0.92
D4	0.84	0.81	0.83	0.91	0.88	0.90
D5	0.80	0.77	0.79	0.82	0.80	0.81
Average	0.85	0.82	0.84	0.91	0.88	0.89

Notes.

Bolded values indicate the average values obtained in this study.