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Evaluation criteria for the three entity recognition tasks
| Challenge | Criterion | Remarks |
|---|---|---|
| 2010 | Exact* | Entities have the same boundary and same type. |
| Inexact | Entities overlap and have the same type. | |
| 2012 | Span* | Entities overlap |
| Type | Entities overlap and have the same type. | |
| 2014 | Exact* | Entities have the same boundary and same type. |
| Token | “Exact” criterion at token-level. |
*represents the primary evaluation criterion for each task
