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Annotation statistics
| a) i2b2 2012 | |||||
| Set | Problem | Test | Treatment | ||
| Train | 4,962 | 2,558 | 3,719 | ||
| Test | 4,270 | 2,140 | 3,213 | ||
| b) SNUH | |||||
| Set | Symptom | Test | Disease | Medication | Procedure |
| Train | 3,923 | 4,559 | 5,084 | 3,642 | 1,175 |
| Test | 3,737 | 3,917 | 4,828 | 3,496 | 1,147 |
| c) CoNLL 2003 | |||||
| Set | Location | Person | Organization | Miscellaneous | |
| Train | 7,140 | 6,600 | 6,321 | 3,438 | |
| Test | 1,656 | 1,617 | 1,662 | 694 | |
