Table 2.

The average F-measure obtained by state-of-the-art systems

Data	Our System	Kong et al.	Zhou et al.	Qi et al.
Dataset.1	89.29%	83.38%	82.75%	82.58%
Dataset.2	87.80%	85.37%	84.68%	83.99%
Dataset.3	88.25%	82.32%	82.28%	83.77%
Dataset.4	89.44%	86.13%	83.72%	82.50%
Overall	88.70	84.30%	83.36%	76.66%
StdDev	0.79	1.75	1.07	0.78