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F-scores for the benchmark system based on [4]. 1.P: unigrams with POS, Pst: position, W: windowed features, Sec: section headings. Best results per column are given in bold.
| Feature | 6-way | 5-way | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| S | U | S | U | |||||||||
| P | R | F | P | R | F | P | R | F | P | R | F | |
| 1.P+Pst | 75.11 | 71.49 | 73.26 | 66.24 | 61.93 | 64.01 | 86.38 | 81.07 | 83.64 | 73.63 | 68.33 | 70.88 |
| 1.P+Pst+W | 72.40 | 68.91 | 70.62 | 64.14 | 59.96 | 61.98 | 85.07 | 79.84 | 82.37 | 72.61 | 67.39 | 69.90 |
| 1.P+Pst+Sec+W | 79.45 | 75.62 | 77.48 | – | – | – | 90.37 | 84.81 | 87.50 | – | – | – |
