Third System
E952370
The Third System was a comprehensive 19th-century U.S. coastal defense program that produced a network of large masonry forts to protect key harbors and strategic points along the American shoreline.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Third System canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T11896636 — 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: Third System Context triple: [Fort Point (Galveston, planned/partial), fortificationSystem, Third System]
-
A.
Auburn system
The Auburn system is a 19th-century prison model characterized by strict discipline, congregate labor by day in enforced silence, and solitary confinement by night.
-
B.
Sistema Central
Sistema Central is a major mountain range in central Spain that forms a natural barrier dividing the northern and southern plateaus of the Iberian Peninsula.
-
C.
Dowdall system
The Dowdall system is a preferential voting method in which voters rank candidates and each ranking is weighted by the reciprocal of its position, favoring broadly acceptable candidates over merely first-choice favorites.
-
D.
System 4
System 4 is an early version of Apple’s classic Macintosh operating system used on compact Macs like the Macintosh SE.
-
E.
The Second
"The Second" is a jazz album by American bassist and composer Derrick Hodge that blends contemporary jazz with elements of soul, hip-hop, and experimental music.
- 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: Third System Target entity description: The Third System was a comprehensive 19th-century U.S. coastal defense program that produced a network of large masonry forts to protect key harbors and strategic points along the American shoreline.
-
A.
Auburn system
The Auburn system is a 19th-century prison model characterized by strict discipline, congregate labor by day in enforced silence, and solitary confinement by night.
-
B.
Sistema Central
Sistema Central is a major mountain range in central Spain that forms a natural barrier dividing the northern and southern plateaus of the Iberian Peninsula.
-
C.
Dowdall system
The Dowdall system is a preferential voting method in which voters rank candidates and each ranking is weighted by the reciprocal of its position, favoring broadly acceptable candidates over merely first-choice favorites.
-
D.
System 4
System 4 is an early version of Apple’s classic Macintosh operating system used on compact Macs like the Macintosh SE.
-
E.
The Second
"The Second" is a jazz album by American bassist and composer Derrick Hodge that blends contemporary jazz with elements of soul, hip-hop, and experimental music.
- F. None of above. chosen
Statements (70)
| Predicate | Object |
|---|---|
| instanceOf |
United States military fortification system
ⓘ
coastal defense program ⓘ |
| appliesToJurisdiction | United States coastline ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| designedBy | U.S. Army Corps of Engineers ⓘ |
| endTime | late 19th century ⓘ |
| follows |
Second System of U.S. coastal fortifications
ⓘ
linked to:
Second System of US seacoast defense
|
| hasCharacteristic |
casemated gun positions
ⓘ
designed for smoothbore artillery ⓘ designed to deter naval attack ⓘ designed to protect major ports ⓘ large permanent forts ⓘ multi-tiered cannon emplacements ⓘ polygonal bastioned trace ⓘ |
| hasEffect |
provided long-term garrison posts for U.S. Army
ⓘ
shaped harbor defense planning in the 19th century ⓘ strengthened U.S. coastal defense infrastructure ⓘ |
| hasPart |
Fort Adams
ⓘ
linked to:
Fort Adams State Park
Fort Adams (Rhode Island) ⓘ Fort Barrancas ⓘ Fort Caswell ⓘ Fort Clinch ⓘ Fort Constitution (New Hampshire, rebuilt) ⓘ
linked to:
Fort Constitution
Fort Delaware ⓘ
linked to:
Fort Delaware State Park
Fort Fisher (partly earthen, associated with system) ⓘ
linked to:
Fort Fisher
Fort Gaines ⓘ Fort Gorges ⓘ Fort Hamilton ⓘ Fort Independence (Boston Harbor, rebuilt) ⓘ Fort Jackson (Louisiana) ⓘ Fort Jackson (Savannah, modernized) ⓘ
linked to:
Fort Jackson, Savannah River
Fort Jefferson ⓘ Fort Knox (Maine) ⓘ Fort Macon ⓘ Fort Macon State Park (Third System fort) ⓘ
linked to:
Fort Macon
Fort Massachusetts (Massachusetts) ⓘ Fort Massachusetts (Mississippi) ⓘ Fort McAllister (associated earthwork defense) ⓘ
linked to:
Fort McAllister
Fort McClary (improved Third System work) ⓘ
linked to:
Fort McClary
Fort McRee ⓘ Fort Mifflin (modernized Third System elements) ⓘ
linked to:
Fort Mifflin
Fort Monroe ⓘ
linked to:
Fort Monroe, Virginia
Fort Morgan ⓘ Fort Pickens ⓘ Fort Point National Historic Site ⓘ Fort Popham ⓘ
linked to:
Fort Popham State Historic Site
Fort Pulaski ⓘ
linked to:
Fort Pulaski National Monument
Fort Schuyler ⓘ Fort Screven (later coastal defense influenced by system) ⓘ
linked to:
Third System of US seacoast defense
Fort St. Philip ⓘ Fort Sumter ⓘ Fort Sumter National Monument ⓘ
linked to:
Fort Sumter
Fort Taylor (Fort Zachary Taylor) ⓘ
linked to:
Fort Zachary Taylor Historic State Park
Fort Trumbull (rebuilt Third System work) ⓘ
linked to:
Fort Trumbull (Third System reconstruction)
Fort Wadsworth (modernized Third System works) ⓘ
linked to:
Fort Wadsworth
Fort Warren ⓘ Fort Washington (Maryland, rebuilt) ⓘ
linked to:
Fort Washington, Maryland
Fort Winthrop ⓘ |
| influencedBy |
French school of fortification
ⓘ
linked to:
Fortifications of Vauban
works of Sébastien Le Prestre de Vauban ⓘ |
| location |
Atlantic coast of the United States
ⓘ
Gulf Coast of the United States ⓘ Key harbors and strategic points along the American shoreline ⓘ Pacific coast of the United States ⓘ
linked to:
West Coast of the United States
|
| mainBuildingMaterial | masonry ⓘ |
| reasonForDevelopment | perceived vulnerability of U.S. coasts after War of 1812 ⓘ |
| replacedBy |
Endicott Period coastal defenses
ⓘ
linked to:
Endicott Period coast defenses
|
| significantEvent | American Civil War ⓘ |
| startTime | circa 1816 ⓘ |
| useDuringConflict | American Civil War ⓘ |
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: Third System Description of subject: The Third System was a comprehensive 19th-century U.S. coastal defense program that produced a network of large masonry forts to protect key harbors and strategic points along the American shoreline.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.