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 of America
ⓘ
surface form:
United States
|
| designedBy | U.S. Army Corps of Engineers NERFINISHED ⓘ |
| endTime | late 19th century ⓘ |
| follows | Second System of U.S. coastal fortifications NERFINISHED ⓘ |
| 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
NERFINISHED
ⓘ
Fort Adams (Rhode Island) NERFINISHED ⓘ Fort Barrancas NERFINISHED ⓘ Fort Caswell NERFINISHED ⓘ Fort Clinch NERFINISHED ⓘ Fort Constitution (New Hampshire, rebuilt) NERFINISHED ⓘ Fort Delaware NERFINISHED ⓘ Fort Fisher (partly earthen, associated with system) NERFINISHED ⓘ Fort Gaines NERFINISHED ⓘ Fort Gorges NERFINISHED ⓘ Fort Hamilton NERFINISHED ⓘ Fort Independence (Boston Harbor, rebuilt) NERFINISHED ⓘ Fort Jackson (Louisiana) NERFINISHED ⓘ Fort Jackson (Savannah, modernized) NERFINISHED ⓘ Fort Jefferson NERFINISHED ⓘ Fort Knox (Maine) NERFINISHED ⓘ Fort Macon NERFINISHED ⓘ Fort Macon State Park (Third System fort) NERFINISHED ⓘ Fort Massachusetts (Massachusetts) NERFINISHED ⓘ Fort Massachusetts (Mississippi) NERFINISHED ⓘ Fort McAllister (associated earthwork defense) NERFINISHED ⓘ Fort McClary (improved Third System work) NERFINISHED ⓘ Fort McRee NERFINISHED ⓘ Fort Mifflin (modernized Third System elements) NERFINISHED ⓘ Fort Monroe NERFINISHED ⓘ Fort Morgan NERFINISHED ⓘ Fort Pickens NERFINISHED ⓘ Fort Point National Historic Site NERFINISHED ⓘ Fort Popham NERFINISHED ⓘ Fort Pulaski NERFINISHED ⓘ Fort Schuyler NERFINISHED ⓘ Fort Screven (later coastal defense influenced by system) NERFINISHED ⓘ Fort St. Philip NERFINISHED ⓘ Fort Sumter NERFINISHED ⓘ Fort Sumter National Monument NERFINISHED ⓘ Fort Taylor (Fort Zachary Taylor) NERFINISHED ⓘ Fort Trumbull (rebuilt Third System work) NERFINISHED ⓘ Fort Wadsworth (modernized Third System works) NERFINISHED ⓘ Fort Warren NERFINISHED ⓘ Fort Washington (Maryland, rebuilt) NERFINISHED ⓘ Fort Winthrop NERFINISHED ⓘ |
| influencedBy |
French school of fortification
NERFINISHED
ⓘ
works of Sébastien Le Prestre de Vauban ⓘ |
| location |
Atlantic coast of the United States
ⓘ
Gulf Coast of the United States NERFINISHED ⓘ Key harbors and strategic points along the American shoreline ⓘ Pacific coast of the United States NERFINISHED ⓘ |
| mainBuildingMaterial | masonry ⓘ |
| reasonForDevelopment | perceived vulnerability of U.S. coasts after War of 1812 ⓘ |
| replacedBy | Endicott Period coastal defenses NERFINISHED ⓘ |
| significantEvent | American Civil War NERFINISHED ⓘ |
| startTime | circa 1816 ⓘ |
| useDuringConflict | American Civil War 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: 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.