395 .692 .502 .740 .174 .187 .176 .663 SVM .622 .703 .659 .863 .319 .323 .315 .800 CRF .818 .643 .720 .917 .472 .462 .464 .892 (b) U-CFO extraction Table 3: Results for different configurations (P: precision, R: recall, F: F-measure, A: accuracy) F-measure.
we conclude that each of our thirteen features was independently effective for extracting CFO and U-CFO in review sentences and that when used together the improvement was even greater.