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Table 3 Example sentences of the entity distances (single: entity not having a precursor)

From: Precursor-induced conditional random fields: connecting separate entities by induction for improved clinical named entity recognition

Type Example sentence with entity annotation
single The patient is a 28-year-old woman who is [HIV positive]problem for 2 years .
distance 0 With [intravenous hydration]treatment [the BUN]test and …
distance 1 … because of [pancytopenia]problem and [vomiting]problem on [DDI]treatment
distance 8 She was brought in for [an esophagogastroduodenoscopy]test on 9/26 but she basically was not sufficiently [sedated]treatment and readmitted at this time for [a GI work-up]test .