Kathryn Chapman


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Logic-Guided Message Generation from Raw Real-Time Sensor Data
Ernie Chang | Alisa Kovtunova | Stefan Borgwardt | Vera Demberg | Kathryn Chapman | Hui-Syuan Yeh
Proceedings of the Thirteenth Language Resources and Evaluation Conference

Natural language generation in real-time settings with raw sensor data is a challenging task. We find that formulating the task as an end-to-end problem leads to two major challenges in content selection – the sensor data is both redundant and diverse across environments, thereby making it hard for the encoders to select and reason on the data. We here present a new corpus for a specific domain that instantiates these properties. It includes handover utterances that an assistant for a semi-autonomous drone uses to communicate with humans during the drone flight. The corpus consists of sensor data records and utterances in 8 different environments. As a structured intermediary representation between data records and text, we explore the use of description logic (DL). We also propose a neural generation model that can alert the human pilot of the system state and environment in preparation of the handover of control.


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CoLi at UdS at SemEval-2020 Task 12: Offensive Tweet Detection with Ensembling
Kathryn Chapman | Johannes Bernhard | Dietrich Klakow
Proceedings of the Fourteenth Workshop on Semantic Evaluation

We present our submission and results for SemEval-2020 Task 12: Multilingual Offensive Language Identification in Social Media (OffensEval 2020) where we participated in offensive tweet classification tasks in English, Arabic, Greek, Turkish and Danish. Our approach included classical machine learning architectures such as support vector machines and logistic regression combined in an ensemble with a multilingual transformer-based model (XLM-R). The transformer model is trained on all languages combined in order to create a fully multilingual model which can leverage knowledge between languages. The machine learning model hyperparameters are fine-tuned and the statistically best performing ones included in the final ensemble.