Paper: Annotating Change of State for Clinical Events

ACL ID W13-1206
Title Annotating Change of State for Clinical Events
Venue Workshop on Events: Definition, Detection, Coreference, and Representation
Year 2013

Understanding the event structure of sentences and whole documents is an important step in being able to extract meaningful information from the text. Our task is the identification of phenotypes, specifically, pneumonia, from clinical narratives. In this paper, we consider the importance of identifying the change of state for events, in particular, events that measure and compare multiple states across time. Change of state is important to the clini- cal diagnosis of pneumonia; in the example ?there are bibasilar opacities that are un- changed?, the presence of bibasilar opacities alone may suggest pneumonia, but not when they are unchanged, which suggests the need to modify events with change of state infor- mation. Our corpus is comprised of chest X- ray reports, where we f...