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arXiv · 2205.03067

Translating Place-Related Questions to GeoSPARQL Queries

Ehsan Hamzei·Martin Tomko·Stephan Winter
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Abstract

Many place-related questions can only be answered by complex spatial reasoning, a task poorly supported by factoid question retrieval. Such reasoning using combinations of spatial and non-spatial criteria pertinent to place-related questions is increasingly possible on linked data knowledge bases. Yet, to enable question answering based on linked knowledge bases, natural language questions must first be re-formulated as formal queries. Here, we first present an enhanced version of YAGO2geo, the geospatially-enabled variant of the YAGO2 knowledge base, by linking and adding more than one million places from OpenStreetMap data to YAGO2. We then propose a novel approach to translate the place-related questions into logical representations, theoretically grounded in the core concepts of spatial information. Next, we use a dynamic template-based approach to generate fully executable GeoSPARQL queries from the logical representations. We test our approach using the Geospatial Gold Standard dataset and report substantial improvements over existing methods.

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Ehsan Hamzei, Martin Tomko, Stephan Winter. 2022-05-06. Translating Place-Related Questions to GeoSPARQL Queries. https://doi.org/10.1145/3485447.3511933

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