Representations of Time Expressions for Temporal Relation Extraction with Convolutional Neural Networks

Token sequences are often used as the input for Convolutional Neural Networks (CNNs) in natural language processing. However, they might not be an ideal representation for time expressions, which are long, highly varied, and semantically complex. We describe a method for representing time expressions with single pseudotokens for CNNs. With this method, we establish a new state-of-the-art result for a clinical temporal relation extraction task.