Table 9.

Comparison of our MLM results with the literature review results. Bold values show the best obtained F-scores

	P	I	O
Number of sentences in training (%)	662 (6.8)	565 (5.9)	3565 (36.6)
Our MLM stage - blind test corpus
F-score	73%	43%	90%
The best F-scores in ALTA shared task [12]
System 1	58%	34%	89%
System 2	51%	35%	86%
The best F-scores in paper [11]
CRF	81%	81%	98%
SVM	31%	21%	90%
Nave Bayes	34%	10%	86%
Multinomial Logistic Regression	41%	28%	90%
Other papers F-score results using the same training and test corpora
Kim et al. [14]	48%	16%	83%
Verbek et al. [30]	29%	21%	85%
Sarker et al. [31]	52%	34%	86%