
Figure 1.
Review Information Extraction Process Based on CRF

Figure 2.
An example of data pretreatment results

TABLE I.
COMPARISON OF F1 BEFORE AND AFTER OPTIMIZATION

Figure 3.
An example of part of speech tagging

Figure 5.
The Feature Template

Figure 4.
Structural Representation of Linear - chain CRF

Figure 6.
Output File

Figure 7.
Examples of no optimized results

Figure 8.
Examples of optimized results