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The distribution of chemical entities with different lengths in the CHEMDNER corpus.
| Entity Length | Training (%) | Development (%) | Test (%) | Overall (%) |
|---|---|---|---|---|
| 1 | 70.50 | 70.82 | 71.45 | 70.90 |
| 2 | 9.33 | 9.29 | 8.99 | 9.21 |
| 3 | 6.28 | 6.12 | 6.28 | 6.22 |
| 4 | 4.63 | 4.43 | 4.06 | 4.39 |
| ≦4 | 90.73 | 90.66 | 90.79 | 90.72 |
| 4 < | 9.27 | 0.34 | 9.21 | 9.28 |
