This work introduces GeoChangesQA, a novel spatiotemporal QA dataset for historical geospatial knowledge. We first developed the Historical County Boundaries Ontology (HCB-O) to create this dataset. Then, we leveraged geospatial historical data spanning regions in the United States from 1630 to 2000 to populate the novel Historical CountyBoundaries Knowledge Graph (HCB-KG). Subsequently, we developed a semi-automated procedure for generating questions, GeoSPARQL queries, and corresponding answers over HCB-KG by leveraging subgraph and query template extraction techniques. Through this method, we automatically generated 8, 900 question-query-answer triples. The code used to create this dataset is available here: github repo The knowledge graph (rdf dumps) which the queries refer to is available here: DOI 10.5281/zenodo.11508198 // Knowledge Graph

Columns Description: Subgraph ID: Unique Subgraph type id SparqlQuery: The SPARQL query Questions: The Question after replacing Uris_match with template variables Sample Answer: One sample answer to the SPARQL query Question_Templates: Subgraph ID: Unique Subgraph type id Graph: The graph schema for every Subgraph ID Questions Templates: A list with every question template

New Version4 Updates: More queries-questions-answers pairs were produced. The dataset contains around 8900 examples Corrections on question templates Update KG