Table 4. Comparison of results.

Methods	Precision	Recall	F-measure
TF-IDF	0.54	0.38	0.43
Machine learning	0.83	0.62	0.7
PageRank	0.72	0.59	0.6
HITS-I	0.78	0.62	0.7
FNG-IE method	0.81	0.61	0.7