Information Extraction from German Patient Records via Hybrid Parsing and Relation Extraction Strategies
Hans‐Ulrich Krieger, Christian Spurk, Hans Uszkoreit, Feiyu Xu, Yi Zhang, Frank Henrik Müller, Thomas Tolxdorff · 2014
In this paper, we report on first attempts and findings to analyzing German patient records, using a hybrid parsing architecture and a combination of two relation extraction strategies.On a practical level, we are interested in the extraction of concepts and relations among those concepts, a necessary cornerstone for building medical information systems.The parsing pipeline consists of a morphological analyzer, a robust chunk parser adapted to Latin phrases used in medical diagnosis, a repair rule stage, and a probabilistic context-free parser that respects the output from the chunker.The relation extraction stage is a combination of two systems: SProUT, a shallow processor which uses hand-written rules to discover relation instances from local text units and DARE which extracts relation instances from complete sentences, using rules that are learned in a bootstrapping process, starting with semantic seeds.Two small experiments have been carried out for the parsing pipeline and the relation extraction stage.