USS Chicago (SSN-721)
E318509
USS Chicago (SSN-721) is a Los Angeles-class nuclear-powered attack submarine of the United States Navy named after the city of Chicago.
All labels observed (1)
| Label | Occurrences |
|---|---|
| USS Chicago (SSN-721) canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T3004765 — 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: USS Chicago (SSN-721) Context triple: [USS Chicago, hasNamesake, USS Chicago (SSN-721)]
-
A.
USS Maryland (SSBN-738)
USS Maryland (SSBN-738) is an Ohio-class nuclear-powered ballistic missile submarine of the United States Navy, designed for strategic deterrence patrols.
-
B.
SSN-571
SSN-571 is the hull number of USS Nautilus, the world’s first operational nuclear-powered submarine and a pioneering vessel in naval history.
-
C.
USS Turner Joy (DD-951)
USS Turner Joy (DD-951) was a Forrest Sherman-class destroyer of the United States Navy best known for its controversial role in the events that escalated U.S. involvement in the Vietnam War.
-
D.
USS Oliver Hazard Perry (FFG-7)
USS Oliver Hazard Perry (FFG-7) was the lead ship of the U.S. Navy’s Oliver Hazard Perry–class guided-missile frigates, serving primarily in anti-submarine and escort roles during the late 20th century.
-
E.
USS George H.W. Bush (CVN-77)
USS George H.W. Bush (CVN-77) is a United States Navy nuclear-powered aircraft carrier named after the 41st U.S. president and former naval aviator George H. W. Bush.
- 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: USS Chicago (SSN-721) Target entity description: USS Chicago (SSN-721) is a Los Angeles-class nuclear-powered attack submarine of the United States Navy named after the city of Chicago.
-
A.
USS Maryland (SSBN-738)
USS Maryland (SSBN-738) is an Ohio-class nuclear-powered ballistic missile submarine of the United States Navy, designed for strategic deterrence patrols.
-
B.
SSN-571
SSN-571 is the hull number of USS Nautilus, the world’s first operational nuclear-powered submarine and a pioneering vessel in naval history.
-
C.
USS Turner Joy (DD-951)
USS Turner Joy (DD-951) was a Forrest Sherman-class destroyer of the United States Navy best known for its controversial role in the events that escalated U.S. involvement in the Vietnam War.
-
D.
USS Oliver Hazard Perry (FFG-7)
USS Oliver Hazard Perry (FFG-7) was the lead ship of the U.S. Navy’s Oliver Hazard Perry–class guided-missile frigates, serving primarily in anti-submarine and escort roles during the late 20th century.
-
E.
USS George H.W. Bush (CVN-77)
USS George H.W. Bush (CVN-77) is a United States Navy nuclear-powered aircraft carrier named after the 41st U.S. president and former naval aviator George H. W. Bush.
- F. None of above. chosen
Statements (51)
| Predicate | Object |
|---|---|
| instanceOf |
Los Angeles-class submarine
ⓘ
United States Navy submarine ⓘ nuclear-powered attack submarine ⓘ |
| armament |
Harpoon missiles capable
ⓘ
Mk 48 torpedoes ⓘ
linked to:
Mark 48 torpedoes
Tomahawk cruise missiles capable ⓘ torpedo tubes ⓘ |
| beam | approximately 10 meters ⓘ |
| branch | United States Navy ⓘ |
| builder | Newport News Shipbuilding ⓘ |
| capability |
long-endurance deployments
ⓘ
submerged high-speed operations ⓘ under-ice operations ⓘ |
| category |
Los Angeles-class submarines
ⓘ
Nuclear submarines of the United States ⓘ Submarines of the United States Navy ⓘ |
| class | Los Angeles class ⓘ |
| commissioned | 1986-09-27 ⓘ |
| constructionStart | early 1980s ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| crewComplement |
approximately 140
ⓘ
officers and enlisted ⓘ |
| design | improved Los Angeles-class design features ⓘ |
| displacement | approximately 6,900 tons submerged ⓘ |
| draft | approximately 9.6 meters ⓘ |
| flag |
United States
ⓘ
linked to:
United States of America
|
| followedBy | USS Key West (SSN-722) ⓘ |
| homeport |
Naval Base Point Loma
ⓘ
San Diego, California ⓘ
linked to:
San Diego, California, United States
|
| hullNumber | SSN-721 ⓘ |
| laidDown | 1981-01-05 ⓘ |
| launched | 1983-10-13 ⓘ |
| length | approximately 110 meters ⓘ |
| namedAfter | Chicago ⓘ |
| namedFor |
Chicago, Illinois
ⓘ
linked to:
Chicago
|
| navalFleet |
United States Pacific Fleet
ⓘ
linked to:
U.S. Pacific Fleet
|
| operator | United States Navy ⓘ |
| partOf |
Los Angeles-class nuclear-powered attack submarines
ⓘ
linked to:
Los Angeles-class submarines
|
| precededBy | USS Houston (SSN-713) ⓘ |
| propulsion | nuclear-powered ⓘ |
| propulsionSystem |
one S6G nuclear reactor
ⓘ
single shaft ⓘ two steam turbines ⓘ |
| role |
anti-submarine warfare
ⓘ
anti-surface warfare ⓘ intelligence, surveillance, and reconnaissance ⓘ strike warfare ⓘ |
| serviceEntry | 1986 ⓘ |
| shipType | attack submarine ⓘ |
| shipyard | Newport News, Virginia ⓘ |
| status | in active service ⓘ |
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: USS Chicago (SSN-721) Description of subject: USS Chicago (SSN-721) is a Los Angeles-class nuclear-powered attack submarine of the United States Navy named after the city of Chicago.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.