Green Diamond
E533775
Green Diamond was a streamlined, diesel-powered passenger train operated by the Illinois Central Railroad, best known for its luxury service between Chicago and St. Louis in the mid-20th century.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Green Diamond canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T5602735 — 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: Green Diamond Context triple: [Illinois Central Railroad, notablePassengerTrain, Green Diamond]
-
A.
Blue Diamond
Blue Diamond is the nickname of the U.S. 1st Marine Division, a storied Marine Corps infantry division renowned for its combat history and distinctive diamond-shaped insignia.
-
B.
Black Diamond
Black Diamond was an early steam locomotive associated with the pioneering Stockton and Darlington Railway, one of the first public railways to use steam power for freight and passengers.
-
C.
Gold Point
Gold Point is a historic Nevada mining ghost town known for its preserved old buildings and Wild West heritage.
-
D.
Sunstone
Sunstone is a renowned long-form poem by Mexican Nobel laureate Octavio Paz, celebrated for its circular structure and rich exploration of time, love, and existential reflection.
-
E.
Emerald
Emerald is a rural town in Central Queensland, Australia, known as a regional service and education hub for the surrounding agricultural and mining communities.
- 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: Green Diamond Target entity description: Green Diamond was a streamlined, diesel-powered passenger train operated by the Illinois Central Railroad, best known for its luxury service between Chicago and St. Louis in the mid-20th century.
-
A.
Blue Diamond
Blue Diamond is the nickname of the U.S. 1st Marine Division, a storied Marine Corps infantry division renowned for its combat history and distinctive diamond-shaped insignia.
-
B.
Black Diamond
Black Diamond was an early steam locomotive associated with the pioneering Stockton and Darlington Railway, one of the first public railways to use steam power for freight and passengers.
-
C.
Gold Point
Gold Point is a historic Nevada mining ghost town known for its preserved old buildings and Wild West heritage.
-
D.
Sunstone
Sunstone is a renowned long-form poem by Mexican Nobel laureate Octavio Paz, celebrated for its circular structure and rich exploration of time, love, and existential reflection.
-
E.
Emerald
Emerald is a rural town in Central Queensland, Australia, known as a regional service and education hub for the surrounding agricultural and mining communities.
- F. None of above. chosen
Statements (32)
| Predicate | Object |
|---|---|
| instanceOf |
named train
ⓘ
passenger train ⓘ |
| amenity |
air-conditioned cars
ⓘ
dining service ⓘ observation car ⓘ |
| colorScheme | green ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| endPoint |
St. Louis, Missouri
ⓘ
linked to:
St. Louis, Missouri, United States
|
| enteredService | 1936 ⓘ |
| era | mid-20th century ⓘ |
| introduced | 1936 ⓘ |
| knownFor |
luxury passenger service
ⓘ
streamlined design ⓘ |
| locomotiveType | diesel-electric ⓘ |
| marketingName | Green Diamond ⓘ |
| namedAfter | Illinois Central’s green corporate color scheme ⓘ |
| operatedOnLine |
Illinois Central main line between Chicago and St. Louis
ⓘ
linked to:
Illinois Central Railroad main line
|
| operator | Illinois Central Railroad ⓘ |
| powerType | diesel ⓘ |
| primaryRoute |
Chicago–St. Louis
ⓘ
linked to:
Chicago–St. Louis corridor
|
| propulsion | diesel engine ⓘ |
| railGauge | standard gauge ⓘ |
| railroad | Illinois Central Railroad ⓘ |
| railwayCompanyHeadquarters |
Chicago, Illinois
ⓘ
linked to:
Chicago
|
| railwayNetwork | Illinois Central Railroad network ⓘ |
| regionServed | Midwestern United States ⓘ |
| serviceClass | first-class ⓘ |
| serviceType | inter-city passenger service ⓘ |
| startPoint |
Chicago, Illinois
ⓘ
linked to:
Chicago
|
| status | discontinued ⓘ |
| successorService | conventional locomotive-hauled trains on the same route ⓘ |
| trainConfiguration | articulated trainset (original configuration) ⓘ |
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: Green Diamond Description of subject: Green Diamond was a streamlined, diesel-powered passenger train operated by the Illinois Central Railroad, best known for its luxury service between Chicago and St. Louis in the mid-20th century.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.