Fort Casey gun batteries
E759493
The Fort Casey gun batteries are historic coastal defense fortifications on Whidbey Island in Washington State, built in the late 19th and early 20th centuries to protect Puget Sound.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Fort Casey gun batteries canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T8808641 — 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: Fort Casey gun batteries Context triple: [Admiralty Head Lighthouse, near, Fort Casey gun batteries]
-
A.
Fort Baker
Fort Baker is a historic former U.S. Army post at the north end of the Golden Gate Bridge in Marin County, California, now part of a waterfront park and conference area within the Golden Gate National Recreation Area.
-
B.
Fort Wrangell
Fort Wrangell was a 19th-century U.S. military post in what is now Wrangell, Alaska, established to assert American presence and control in the region following the Alaska Purchase.
-
C.
Fort Wetherill
Fort Wetherill is a former coastal artillery fortification in Jamestown, Rhode Island, that played a key role in the seacoast defense system of Narragansett Bay and is now preserved as a state park.
-
D.
Fort Gratiot
Fort Gratiot was a 19th-century U.S. Army fortification in Michigan that guarded the strategic junction of the St. Clair River and Lake Huron.
-
E.
Fort Whipple
Fort Whipple is a historic 19th-century U.S. Army post near Prescott, Arizona, that played a key role in the military settlement and defense of the Arizona Territory.
- 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: Fort Casey gun batteries Target entity description: The Fort Casey gun batteries are historic coastal defense fortifications on Whidbey Island in Washington State, built in the late 19th and early 20th centuries to protect Puget Sound.
-
A.
Fort Baker
Fort Baker is a historic former U.S. Army post at the north end of the Golden Gate Bridge in Marin County, California, now part of a waterfront park and conference area within the Golden Gate National Recreation Area.
-
B.
Fort Wrangell
Fort Wrangell was a 19th-century U.S. military post in what is now Wrangell, Alaska, established to assert American presence and control in the region following the Alaska Purchase.
-
C.
Fort Wetherill
Fort Wetherill is a former coastal artillery fortification in Jamestown, Rhode Island, that played a key role in the seacoast defense system of Narragansett Bay and is now preserved as a state park.
-
D.
Fort Gratiot
Fort Gratiot was a 19th-century U.S. Army fortification in Michigan that guarded the strategic junction of the St. Clair River and Lake Huron.
-
E.
Fort Whipple
Fort Whipple is a historic 19th-century U.S. Army post near Prescott, Arizona, that played a key role in the military settlement and defense of the Arizona Territory.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf | coastal defense fortification ⓘ |
| armamentType |
coast artillery guns
ⓘ
disappearing guns ⓘ rifled artillery ⓘ |
| associatedWith |
Fort Flagler
NERFINISHED
ⓘ
Fort Worden NERFINISHED ⓘ |
| builtDuring |
early 20th century
ⓘ
late 19th century ⓘ |
| category |
Coastal fortifications in the United States
ⓘ
Military history of Washington State ⓘ |
| constructedFor |
coastal defense of Puget Sound
ⓘ
harbor defense ⓘ protection of naval shipyards in Puget Sound ⓘ |
| constructionEndApprox | early 1900s ⓘ |
| constructionStartApprox | 1897 ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| currentUse |
interpretive historic site
ⓘ
tourist attraction ⓘ |
| designedBy | U.S. Army Corps of Engineers NERFINISHED ⓘ |
| designedToDefend | entrance to Admiralty Inlet ⓘ |
| era | Endicott Period NERFINISHED ⓘ |
| feature |
concrete gun emplacements
ⓘ
magazines ⓘ observation stations ⓘ underground passages ⓘ |
| garrisonType | Coast Artillery Corps NERFINISHED ⓘ |
| heritageDesignation | contributing resources to a historic district ⓘ |
| locatedIn |
Island County, Washington
NERFINISHED
ⓘ
Puget Sound region NERFINISHED ⓘ United States of America ⓘ
surface form:
United States
Washington ⓘ
surface form:
Washington State
Whidbey Island NERFINISHED ⓘ |
| managedBy | Washington State Parks and Recreation Commission NERFINISHED ⓘ |
| material |
reinforced concrete
ⓘ
steel gun mounts ⓘ |
| near | Coupeville, Washington NERFINISHED ⓘ |
| openToPublic | true ⓘ |
| operatorHistoric | United States Army NERFINISHED ⓘ |
| overlooks | Admiralty Inlet NERFINISHED ⓘ |
| partOf |
Fort Casey
NERFINISHED
ⓘ
Fort Casey State Park NERFINISHED ⓘ “Triangle of Fire” Puget Sound coastal defenses NERFINISHED ⓘ |
| significance | example of Endicott-era coastal fortifications ⓘ |
| status |
disarmed
ⓘ
historic site ⓘ |
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: Fort Casey gun batteries Description of subject: The Fort Casey gun batteries are historic coastal defense fortifications on Whidbey Island in Washington State, built in the late 19th and early 20th centuries to protect Puget Sound.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.