AMIA Annu Symp Proc - It's about this and that: a description of anaphoric expressions in clinical text.

Tópicos

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Resumo

Although anaphoric expressions are very common in biomedical and clinical documents, little work has been done to systematically characterize their use in clinical text. Samples of 'it', 'this', and 'that' expressions occurring in inpatient clinical notes from four metropolitan hospitals were analyzed using a combination of semi-automated and manual annotation techniques. We developed a rule-based approach to filter potential non-referential expressions. A physician then manually annotated 1000 potential referential instances to determine referent status and the antecedent of each referent expression. A distributional analysis of the three referring expressions in the entire corpus of notes demonstrates a high prevalence of anaphora and large variance in distributions of referential expressions with different notes. Our results confirm that anaphoric expressions are common in clinical texts. Effective co-reference resolution with anaphoric expressions remains an important challenge in medical natural language processing research.

Resumo Limpo

although anaphor express common biomed clinic document littl work done systemat character use clinic text sampl express occur inpati clinic note four metropolitan hospit analyz use combin semiautom manual annot techniqu develop rulebas approach filter potenti nonreferenti express physician manual annot potenti referenti instanc determin refer status anteced refer express distribut analysi three refer express entir corpus note demonstr high preval anaphora larg varianc distribut referenti express differ note result confirm anaphor express common clinic text effect corefer resolut anaphor express remain import challeng medic natur languag process research

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