Table 2.

Aspect-level sentiment analysis results obtained with the three N-gram methods.

N-gram value		N-gram before	N-gram after	N-gram around
2	P	63.51	73.93	77.20
	R	62.00	73.33	76.33
	F1	62.22	73.48	76.46
3	P	69.74	78.62	81.93
	R	69.33	78.20	81.13
	F1	69.42	78.31	81.24
4	P	67.57	76.71	78.25
	R	66.93	76.20	77.40
	F1	67.02	76.34	77.52
5	P	67.91	74.95	79.60
	R	67.27	74.40	78.73
	F1	67.35	74.54	78.86
6	P	65.40	75.77	78.81
	R	64.53	75.20	77.93
	F1	64.62	75.34	78.06