Foster City, California
E233207
Foster City, California is a planned waterfront suburb in the San Francisco Bay Area known for its extensive lagoon system, residential communities, and tech-industry presence.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Foster City, California canonical | 6 |
| Foster City | 5 |
| Foster City, California, United States | 4 |
| City of Foster City | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T507159 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Foster City, California Context triple: [San Mateo County, California, hasCity, Foster City, California]
-
A.
Palo Alto, California
Palo Alto, California is a major Silicon Valley city known for its role as a global technology and innovation hub and as the home of Stanford University.
-
B.
Menlo Park, California
Menlo Park, California is a city in Silicon Valley known as a hub for technology and venture capital, home to major research institutions and tech companies.
-
C.
South San Francisco
South San Francisco is a city in northern San Mateo County, California, known for its industrial roots, biotech industry presence, and location just south of San Francisco.
-
D.
Redwood City, California
Redwood City, California is a city on the San Francisco Peninsula in Silicon Valley, known for its historic downtown and role as the county seat of San Mateo County.
-
E.
Emeryville, California
Emeryville, California is a small city in the San Francisco Bay Area best known as the longtime home of Pixar Animation Studios and a hub for tech and creative industries.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Foster City, California Target entity description: Foster City, California is a planned waterfront suburb in the San Francisco Bay Area known for its extensive lagoon system, residential communities, and tech-industry presence.
-
A.
Palo Alto, California
Palo Alto, California is a major Silicon Valley city known for its role as a global technology and innovation hub and as the home of Stanford University.
-
B.
Menlo Park, California
Menlo Park, California is a city in Silicon Valley known as a hub for technology and venture capital, home to major research institutions and tech companies.
-
C.
South San Francisco
South San Francisco is a city in northern San Mateo County, California, known for its industrial roots, biotech industry presence, and location just south of San Francisco.
-
D.
Redwood City, California
Redwood City, California is a city on the San Francisco Peninsula in Silicon Valley, known for its historic downtown and role as the county seat of San Mateo County.
-
E.
Emeryville, California
Emeryville, California is a small city in the San Francisco Bay Area best known as the longtime home of Pixar Animation Studios and a hub for tech and creative industries.
- F. None of above. chosen
Statements (52)
| Predicate | Object |
|---|---|
| instanceOf |
city
ⓘ
planned community ⓘ suburb ⓘ |
| areaCode | 650 ⓘ |
| areaLandKm2 | 9.91 ⓘ |
| areaTotalKm2 | 51.90 ⓘ |
| areaWaterKm2 | 41.99 ⓘ |
| areaWaterPercent | about 80.9 ⓘ |
| borderedBy |
Belmont, California
ⓘ
San Francisco Bay ⓘ San Mateo, California ⓘ
linked to:
San Mateo, California, United States
|
| climate | Mediterranean climate ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| county |
San Mateo County
ⓘ
linked to:
San Mateo County, California
|
| economySector |
biotechnology
ⓘ
financial services ⓘ technology industry ⓘ |
| elevationMeters | 2 ⓘ |
| governmentType | council–manager ⓘ |
| hasFacility |
Foster City Library
ⓘ
Foster City Recreation Center ⓘ |
| hasFeature |
artificial islands
ⓘ
extensive levees ⓘ lagoon system ⓘ residential planned neighborhoods ⓘ waterfront parks ⓘ |
| hasRecreation |
biking trails
ⓘ
boating ⓘ kayaking ⓘ waterfront walking paths ⓘ windsurfing ⓘ |
| hasWaterBody | Central Lake (lagoon) ⓘ |
| highSchoolDistrict | San Mateo Union High School District ⓘ |
| hostsCompany |
Gilead Sciences (headquarters)
ⓘ
linked to:
Gilead Sciences (board member)
Visa Inc. (corporate offices historically located there) ⓘ
linked to:
Visa
|
| incorporated | 1971 ⓘ |
| locatedIn | San Francisco Bay Area ⓘ |
| locatedOn |
San Francisco Bay
ⓘ
San Francisco Peninsula ⓘ |
| medianHouseholdIncomeRank | among higher-income cities in California ⓘ |
| namedAfter | T. Jack Foster ⓘ |
| partOf |
Silicon Valley region (broadly defined)
ⓘ
linked to:
Silicon Valley
|
| population | approximately 34,000 ⓘ |
| populationAsOf | 2020 ⓘ |
| postalCode | 94404 ⓘ |
| schoolDistrict |
San Mateo–Foster City School District
ⓘ
linked to:
San Mateo-Foster City School District
|
| state |
California
ⓘ
linked to:
California, United States
|
| timeZone | Pacific Time Zone ⓘ |
| transportationAccess |
San Mateo–Hayward Bridge nearby
ⓘ
U.S. Route 101 nearby ⓘ |
| utcOffset | UTC−8 ⓘ |
| utcOffsetDst | UTC−7 ⓘ |
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: Foster City, California Description of subject: Foster City, California is a planned waterfront suburb in the San Francisco Bay Area known for its extensive lagoon system, residential communities, and tech-industry presence.
Referenced by (16)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Foster City, California
linked to: Foster City, California
linked to: Foster City, California
linked to: Foster City, California
subject linked to:
Belmont
subject linked to:
Gilead Sciences (board member)
linked to: Foster City, California
linked to: Foster City, California
linked to: Foster City, California
linked to: Foster City, California
linked to: Foster City, California
linked to: Foster City, California