Role-based model for Named Entity Recognition
Pablo Calleja, Ra{\'u}l Garc{\'\i}a-Castro, Guadalupe Aguado-de-Cea, Asunci{\'o}n G{\'o}mez-P{\'e}rez
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Named Entity Recognition (NER) poses new challenges in real-world documents in which there are entities with different roles according to their purpose or meaning. Retrieving all the possible entities in scenarios in which only a subset of them based on their role is needed, produces noise on the overall precision. This work proposes a NER model that relies on role classification models that support recognizing entities with a specific role. The proposed model has been implemented in two use cases using Spanish drug Summary of Product Characteristics: identification of therapeutic indications and identification of adverse reactions. The results show how precision is increased using a NER model that is oriented towards a specific role and discards entities out of scope.