Martinez, California

E93615

city county seat

Martinez, California is a historic waterfront city in the San Francisco Bay Area known as the county seat of Contra Costa County and for its role as a regional rail and transportation hub.

Try in SPARQL Jump to: Surface forms Statements Referenced by

All labels observed (4)

Label	Occurrences
Martinez, California canonical	25
Martinez, California, United States	6
Martinez	4
City of Martinez, California	2

Statements (48)

Predicate	Object
instanceOf	city ⓘ county seat ⓘ
areaCode	925 ⓘ
associatedWithPerson	John Muir ⓘ
climate	Mediterranean climate ⓘ
country	United States of America ⓘ surface form: United States
county	Contra Costa County ⓘ
elevationAboveSeaLevel	approximately 10 meters ⓘ approximately 33 feet ⓘ
FIPSCode	06-46046 ⓘ
GNISFeatureID	0277564 ⓘ
governmentType	council–manager government ⓘ
hasHistoricDistrict	Downtown Martinez historic district ⓘ
hasHistoricSignificance	one of the older towns in Contra Costa County ⓘ
hasLandmark	Contra Costa County Courthouse ⓘ John Muir National Historic Site ⓘ Martinez Marina ⓘ
hasMajorHighway	Interstate 680 ⓘ State Route 4 ⓘ
hasMayorCouncilForm	yes ⓘ
hasOfficialWebsite	https://www.cityofmartinez.org/ ⓘ
hasRailService	Amtrak ⓘ
hasRailStation	Martinez Amtrak station ⓘ
hasWaterBody	Alhambra Creek ⓘ
incorporatedAsCity	1876 ⓘ
isCountySeatOf	Contra Costa County ⓘ
knownFor	county government center ⓘ historic downtown ⓘ role as regional rail hub ⓘ waterfront and marina ⓘ
locatedIn	San Francisco Bay Area ⓘ
locatedInRegion	East Bay ⓘ
locatedInTimeZone	Pacific Time Zone ⓘ
locatedNear	Benicia ⓘ surface form: Benicia, California Concord, California, United States ⓘ surface form: Concord, California Walnut Creek, California ⓘ
locatedNortheastOf	San Francisco, California, United States of America ⓘ surface form: San Francisco, California
locatedOn	Carquinez Pass ⓘ surface form: Carquinez Strait
locatedWestOf	Sacramento ⓘ surface form: Sacramento, California
partOfMetropolitanArea	San Francisco Bay Area ⓘ surface form: San Francisco–Oakland–Berkeley metropolitan area
postalCode	94553 ⓘ
regionCode	US-CA ⓘ
servedByRailLine	California Zephyr ⓘ Amtrak Capitol Corridor ⓘ surface form: Capitol Corridor Coast Starlight ⓘ San Joaquins ⓘ
state	California, United States ⓘ surface form: California
timeZoneDST	Pacific Time Zone ⓘ surface form: Pacific Daylight Time

How these facts were elicited

The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.

Instruction

You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10.

# Requirements
- If you don't know the subject at all, return an empty list.
- If the subject is not a named entity, return an empty list.
- Include at least one triple where predicate is "instanceOf".
- Do not get too wordy.
- Separate several objects into multiple triples with one object.

Input

Subject: Martinez, California
Description of subject: Martinez, California is a historic waterfront city in the San Francisco Bay Area known as the county seat of Contra Costa County and for its role as a regional rail and transportation hub.

Referenced by (37)

Full triples — surface form annotated when it differs from this entity's canonical label.

Amtrak Capitol Corridor → servesCity → Martinez, California ⓘ

Joe DiMaggio → placeOfBirth → Martinez, California ⓘ

this entity surface form: Martinez, California, United States

John Muir → burialPlace → Martinez, California ⓘ

this entity surface form: Martinez, California, United States

John Muir → residence → Martinez, California ⓘ

this entity surface form: Martinez, California, United States

Contra Costa County → hasCountySeat → Martinez, California ⓘ

Suisun Bay → locatedNear → Martinez, California ⓘ

this entity surface form: City of Martinez, California

East Bay → contains → Martinez, California ⓘ

Contra Costa Canal → suppliesWaterTo → Martinez, California ⓘ

The Yankee Clipper → placeOfBirth → Martinez, California ⓘ

subject surface form: Joe DiMaggio

this entity surface form: Martinez, California, United States

National Defense Reserve Fleet, Suisun Bay → nearCity → Martinez, California ⓘ

Bay Point, California → locatedEastOf → Martinez, California ⓘ

Carquinez Strait Regional Shoreline → locatedNear → Martinez, California ⓘ

Briones Regional Park → hasAccessPoint → Martinez, California ⓘ

Vine Hill, California → locatedNear → Martinez, California ⓘ

Vine Hill, California → adjacentTo → Martinez, California ⓘ

Vine Hill, California → nearestCity → Martinez, California ⓘ

Vine Hill, California → economicLink → Martinez, California ⓘ

Joltin' Joe → birthPlace → Martinez, California ⓘ

subject surface form: Joe DiMaggio

this entity surface form: Martinez, California, United States

California State Route 4 → passesThrough → Martinez, California ⓘ

this entity surface form: Martinez

Vince DiMaggio → placeOfBirth → Martinez, California ⓘ

this entity surface form: Martinez, California, United States

Louisa Wanda Strentzel → residence → Martinez, California ⓘ

Louisa Wanda Strentzel → placeOfActivity → Martinez, California ⓘ

Port Costa, California → locatedNear → Martinez, California ⓘ

Crockett, California → locatedNear → Martinez, California ⓘ

Interstate 680 → connectsCity → Martinez, California ⓘ

Benicia–Martinez Bridge → connects → Martinez, California ⓘ

Benicia–Martinez Bridge → namedAfter → Martinez, California ⓘ

this entity surface form: Martinez

Pleasant Hill, California → neighboringCity → Martinez, California ⓘ

Hercules, California → locatedWestOf → Martinez, California ⓘ

Pacheco, California → locatedNear → Martinez, California ⓘ

Clyde, California → locatedNear → Martinez, California ⓘ

State Route 4 → passesThrough → Martinez, California ⓘ

subject surface form: State Route 4 (California)

Benicia → locatedNear → Martinez, California ⓘ

this entity surface form: Martinez

County Connection → operatesInCity → Martinez, California ⓘ

Contra Costa Canal Trail → passesThrough → Martinez, California ⓘ

Martinez Reservoir → locatedNear → Martinez, California ⓘ

this entity surface form: City of Martinez, California

San Joaquins route → servesCity → Martinez, California ⓘ

this entity surface form: Martinez