Harbor Defenses of San Francisco
E672703
Harbor Defenses of San Francisco were a network of coastal fortifications and artillery installations designed to protect the San Francisco Bay and its vital military and commercial assets from naval attack.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Harbor Defenses of San Francisco canonical | 1 |
| Harbor defenses of San Francisco | 1 |
| San Francisco Bay defenses | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7565354 — 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: Harbor Defenses of San Francisco Context triple: [Fort Cronkhite, partOf, Harbor Defenses of San Francisco]
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A.
Presidio of San Francisco
The Presidio of San Francisco is a former U.S. Army military post at the northern tip of the San Francisco Peninsula that has been transformed into a national park site featuring historic buildings, scenic overlooks, and extensive recreational areas.
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B.
Fort Point (San Francisco)
Fort Point (San Francisco) is a 19th-century brick masonry coastal fortification built to guard the Golden Gate strait, now preserved as a historic site beneath the Golden Gate Bridge.
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C.
San Francisco Maritime National Historical Park
San Francisco Maritime National Historical Park is a waterfront national historical park in San Francisco that preserves and interprets the city’s rich maritime heritage through historic ships, a museum, and educational exhibits.
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D.
Port of Benicia
The Port of Benicia is a deep-water port in Benicia, California, primarily handling automobile imports/exports and petroleum-related cargo on the Carquinez Strait.
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E.
Mare Island Naval Shipyard
Mare Island Naval Shipyard was a major U.S. Navy shipbuilding and repair facility in Vallejo, California, notable as one of the first permanent naval shipyards on the West Coast.
- 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: Harbor Defenses of San Francisco Target entity description: Harbor Defenses of San Francisco were a network of coastal fortifications and artillery installations designed to protect the San Francisco Bay and its vital military and commercial assets from naval attack.
-
A.
Presidio of San Francisco
The Presidio of San Francisco is a former U.S. Army military post at the northern tip of the San Francisco Peninsula that has been transformed into a national park site featuring historic buildings, scenic overlooks, and extensive recreational areas.
-
B.
Fort Point (San Francisco)
Fort Point (San Francisco) is a 19th-century brick masonry coastal fortification built to guard the Golden Gate strait, now preserved as a historic site beneath the Golden Gate Bridge.
-
C.
San Francisco Maritime National Historical Park
San Francisco Maritime National Historical Park is a waterfront national historical park in San Francisco that preserves and interprets the city’s rich maritime heritage through historic ships, a museum, and educational exhibits.
-
D.
Port of Benicia
The Port of Benicia is a deep-water port in Benicia, California, primarily handling automobile imports/exports and petroleum-related cargo on the Carquinez Strait.
-
E.
Mare Island Naval Shipyard
Mare Island Naval Shipyard was a major U.S. Navy shipbuilding and repair facility in Vallejo, California, notable as one of the first permanent naval shipyards on the West Coast.
- F. None of above. chosen
Statements (61)
| Predicate | Object |
|---|---|
| instanceOf |
United States Army harbor defense command
ⓘ
coastal defense system ⓘ |
| armament |
12-inch coast defense guns
ⓘ
16-inch coast defense guns ⓘ 6-inch coast defense guns ⓘ anti-aircraft guns ⓘ disappearing guns ⓘ mortars ⓘ rifled muzzle-loading cannon (early period) ⓘ searchlights ⓘ submarine mines ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| era |
Endicott Period
NERFINISHED
ⓘ
Taft Period NERFINISHED ⓘ World War I NERFINISHED ⓘ World War II ⓘ interwar period ⓘ |
| garrison |
Coast Artillery Corps regiments
NERFINISHED
ⓘ
National Guard coast artillery units NERFINISHED ⓘ regular United States Army units ⓘ |
| hasPart |
Battery Boutelle
NERFINISHED
ⓘ
Battery Chamberlin NERFINISHED ⓘ Battery Crosby NERFINISHED ⓘ Battery Davis NERFINISHED ⓘ Battery Dynamite NERFINISHED ⓘ Battery Godfrey NERFINISHED ⓘ Battery Howe NERFINISHED ⓘ Battery Ledyard NERFINISHED ⓘ Battery Mendell NERFINISHED ⓘ Battery Townsley NERFINISHED ⓘ Battery Wallace NERFINISHED ⓘ Fort Baker NERFINISHED ⓘ Fort Baker Mine Depot NERFINISHED ⓘ Fort Barry NERFINISHED ⓘ Fort Cronkhite NERFINISHED ⓘ Fort Funston NERFINISHED ⓘ Fort McDowell NERFINISHED ⓘ Fort Miley NERFINISHED ⓘ Fort Point NERFINISHED ⓘ Fort Winfield Scott NERFINISHED ⓘ anti-aircraft batteries ⓘ coast artillery batteries ⓘ fire control stations ⓘ harbor mine casemates ⓘ searchlight stations ⓘ submarine mine fields ⓘ |
| heritageStatus | many former batteries incorporated into Golden Gate National Recreation Area ⓘ |
| locatedIn |
California, United States
ⓘ
surface form:
California
San Francisco Bay NERFINISHED ⓘ West Coast of the United States NERFINISHED ⓘ |
| notableSite | Golden Gate NERFINISHED ⓘ |
| operator | United States Army ⓘ |
| partOf | United States coastal defense system NERFINISHED ⓘ |
| primaryFunction |
defense of San Francisco Bay against naval attack
ⓘ
protection of commercial shipping in San Francisco Bay ⓘ protection of military installations around San Francisco Bay ⓘ |
| status | deactivated ⓘ |
| strategicImportance | protection of Pacific coast naval and commercial hub at San Francisco ⓘ |
| successor | Nike missile defenses around San Francisco Bay ⓘ |
| usedBy |
United States Army Air Defense Artillery
NERFINISHED
ⓘ
United States Army Coast Artillery Corps NERFINISHED ⓘ |
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: Harbor Defenses of San Francisco Description of subject: Harbor Defenses of San Francisco were a network of coastal fortifications and artillery installations designed to protect the San Francisco Bay and its vital military and commercial assets from naval attack.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Harbor defenses of San Francisco
this entity surface form:
San Francisco Bay defenses