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A Neuro-Symbolic Approach for Real-World Event Recognition from Weak Supervision

Authors Gianluca Apriceno, Andrea Passerini, Luciano Serafini

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Author Details

Gianluca Apriceno
  • University of Trento, Italy
  • Fondazione Bruno Kessler, Trento, Italy
Andrea Passerini
  • University of Trento, Italy
Luciano Serafini
  • Fondazione Bruno Kessler, Trento, Italy

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Gianluca Apriceno, Andrea Passerini, and Luciano Serafini. A Neuro-Symbolic Approach for Real-World Event Recognition from Weak Supervision. In 29th International Symposium on Temporal Representation and Reasoning (TIME 2022). Leibniz International Proceedings in Informatics (LIPIcs), Volume 247, pp. 12:1-12:19, Schloss Dagstuhl - Leibniz-Zentrum für Informatik (2022)


Events are structured entities involving different components (e.g, the participants, their roles etc.) and their relations. Structured events are typically defined in terms of (a subset of) simpler, atomic events and a set of temporal relation between them. Temporal Event Detection (TED) is the task of detecting structured and atomic events within data streams, most often text or video sequences, and has numerous applications, from video surveillance to sports analytics. Existing deep learning approaches solve TED task by implicitly learning the temporal correlations among events from data. As consequence, these approaches often fail in ensuring a consistent prediction in terms of the relationship between structured and atomic events. On the other hand, neuro-symbolic approaches have shown their capability to constrain the output of the neural networks to be consistent with respect to the background knowledge of the domain. In this paper, we propose a neuro-symbolic approach for TED in a real world scenario involving sports activities. We show how by incorporating simple knowledge involving the relative order of atomic events and constraints on their duration, the approach substantially outperforms a fully neural solution in terms of recognition accuracy, when little or even no supervision is available on the atomic events.

Subject Classification

ACM Subject Classification
  • Computing methodologies → Temporal reasoning
  • Computing methodologies → Activity recognition and understanding
  • structured events
  • temporal event detection
  • neuro-symbolic integration


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