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language:
- en
tags:
- climate-change
- named-entity-recognition
- wikidata
- knowledge-graph
- text2kg
license: cc-by-4.0
---
# Climate Change Core Entities & Wikidata Alignment
## Dataset Description
This dataset contains **core climate change-related terms** aligned with Wikidata items, alongside their frequency of occurrence in a domain-specific research corpus, dictionary definitions, and hierarchical Wikidata attributes. It was developed to facilitate the automatic construction of domain-specific Named Entity Recognition (NER) types for knowledge graph generation in the climate change domain.
The terms were sourced from authoritative resources (e.g., NOAA Full Weather Glossary, Glossary of Meteorology, ClimateBERT) and validated against a corpus of climate change research papers. The terms were semi-automatically aligned with Wikidata using SPARQL queries to capitalize on Wikidata's hierarchical structure.
### Derived NER Types
By analyzing the Wikidata hierarchical neighbourhood graph (using *instance of* (P31) and *subclass of* (P279) relations, provided in this dataset) and applying the weighted Louvain community detection algorithm, this entity set was mapped to **21 domain-specific NER types**:
*Ecosystem, Energy Source, Natural Disaster, Meteorological Phenomenon, Quantity, Astronomical Object, Body of Water, Disease, Location, Measurement Unit, Physical Phenomenon, Chemical, Time Period, Organization, Natural Phenomenon, Field of Study, Mathematical Expression, Measuring Device, Geographical Feature, System,* and *Satellite.*
## Data Structure
The dataset contains the following rich features:
- **`term`**: The core entity term as analyzed in the corpus.
- **`term_dictionary`**: The casing/phrasing of the term as it originally appeared in the source dictionary.
- **`link`**: URL pointing to the exact source glossary or dictionary page.
- **`source`**: Identifier code for the dictionary or resource the term was extracted from.
- **`term_wikidata`**: The term exactly as matched in the Wikidata graph.
- **`wikidata_item`**: The full URI of the Wikidata item representing the entity.
- **`wikidata_label`**: The official English label of the item in Wikidata.
- **`definition`**: The text definition extracted from the source dictionary.
- **`wikidata_desc`**: The short description text pulled from Wikidata.
- **`wikidata_types`**: A list of classes this entity is an *instance of* (Wikidata property P31).
- **`wikidata_subclasses`**: A list of parent classes this entity is a *subclass of* (Wikidata property P279).
- **`ro`**: Manual review/curation flag (e.g., 'r' for retained).
- **`wikidata_subclass`**: Additional sub-classification data.
- **`Frequency`**: The total count of how many times this term appeared in the climate change research corpus.
## Citation
If you use this dataset in your research, please cite the following paper:
```bibtex
@inproceedings{poleksic2025Wikidata,
author = {Poleksi{'{c}}, Andrija and Martin{ {c}}i{'{c}}-Ip{ {s}}i{'{c}}, Sanda},
title = {Wikidata Hierarchy for Named Entity Type Discovery in the Climate Change Domain},
booktitle = {Proceedings of the 4th International Workshop on LLM-Integrated Knowledge Graph Generation from Text (LLM-TEXT2KG 2025), co-located with the Extended Semantic Web Conference (ESWC 2025)},
year = {2025},
month = jun,
address = {Portoro {z}, Slovenia}
}
```
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