{ "contentStorage": "postgres", "title": "Mercer County · Relations", "description": "Mercer County is a county of New Jersey, United States.", "url": "/en/places/nj-mercer-county/relation.html", "entity": { "id": "place_us_nj_mercer_county", "type": "place", "title": "Mercer County", "slug": "nj-mercer-county", "summary": "Mercer County is a county of New Jersey, United States.", "status": "published", "categories": [ "category-geography" ], "tags": [], "sources": [ { "id": "geonames", "title": "GeoNames US dataset (US.txt / admin2Codes.txt)", "url": "https://download.geonames.org/export/dump/US.zip" } ], "createdAt": "2026-10-29T10:33:09+08:00", "updatedAt": "2026-10-29T10:33:09+08:00", "updatedBy": "user:admin", "revision": 2, "body": "## Overview\n\nMercer County is a county of [[place_us_nj|New Jersey]], United States (FIPS nj021), with a population of about 366,513[^geonames].\n\n## Geography\n\n- Coordinates: 40.2834, -74.7017\n- Time zone: America/New_York", "url": "/places/nj-mercer-county.html", "lang": "en", "availableLangs": [ "zh", "en" ], "placeKind": "county", "coordinates": { "latitude": 40.2834, "longitude": -74.70169 }, "adminArea": "United States · New Jersey · Mercer County" }, "entities": null, "relations": [ { "id": "rel_us_county_nj021", "fromId": "place_us_nj_mercer_county", "relationType": "located_in", "toId": "place_us_nj", "sourceRefs": [ { "entityId": "place_us_nj_mercer_county", "sourceId": "geonames" } ], "label": "Located in", "targetId": "place_us_nj", "targetTitle": "New Jersey", "targetUrl": "/en/places/new-jersey.html", "incoming": false }, { "id": "rel_us_city_4833084", "fromId": "place_us_nj_yardville", "relationType": "located_in", "toId": "place_us_nj_mercer_county", "sourceRefs": [ { "entityId": "place_us_nj_yardville", "sourceId": "geonames" } ], "label": "Contains places", "targetId": "place_us_nj_yardville", "targetTitle": "Yardville", "targetUrl": "/en/places/nj-yardville.html", "incoming": true }, { "id": 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