# tunnel

> underground passageway

**Wikidata**: [Q44377](https://www.wikidata.org/wiki/Q44377)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Tunnel)  
**Source**: https://4ort.xyz/entity/tunnel


## References

1. Library of Congress
2. RAMEAU
3. Nuovo soggettario
4. Freebase Data Dumps. 2013
5. Biblioteca Nacional de España
6. BBC Things
7. YSO-Wikidata mapping project
8. [Environment Ontology](https://raw.githubusercontent.com/INCATools/environments2wikidata/master/matches/curated-high-confidence-envo.tsv)
9. Quora
10. [archINFORM](https://www.archinform.net/service/wd_aistich.php)
11. National Library of Israel
12. KBpedia
13. GF WordNet
14. [Source](https://beta-paikkatieto.maanmittauslaitos.fi/catalogue/v1/codelistgroups/geographic-names/codelists/placetype/items?lang=eng)
15. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)