Triple
T3629196
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Pennsylvania Railroad Altoona Works |
E76912
|
entity |
| Predicate | railroadShopFor |
P19147
|
FINISHED |
| Object |
Pennsylvania Railroad locomotives
Pennsylvania Railroad locomotives were the diverse fleet of steam, electric, and diesel engines that powered one of the largest and most influential railroads in the United States throughout the late 19th and early 20th centuries.
|
E371413
|
NE FINISHED |
How this triple was built (5 steps)
Every LLM step that produced this triple, in pipeline order — named-entity classification, the disambiguation choices (the exact options shown, with the pick highlighted), and the generated description. The batch + timestamp of each is in the Provenance table below.
NER
Named-entity recognition
gpt-5-mini
Instruction
Given a phrase, classify it is english named entity (e.g., persons, organizations, works of art) in Latin script, or not (e.g., literals, dates, URLs, verbose phrases). For disambiguation, the statement where the phrase occurs as object is also given. Please return a JSON object with `phrase` (string, the phrase being analyzed) and `is_ne` (boolean, indicating whether the phrase is a Named Entity).
Input
Phrase: Pennsylvania Railroad locomotives | Statement: [Pennsylvania Railroad Altoona Works, railroadShopFor, Pennsylvania Railroad locomotives]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Pennsylvania Railroad locomotives Context triple: [Pennsylvania Railroad Altoona Works, railroadShopFor, Pennsylvania Railroad locomotives]
-
A.
Pennsylvania Railroad Altoona Works
Pennsylvania Railroad Altoona Works was a major locomotive and railcar manufacturing and maintenance complex in Altoona, Pennsylvania, renowned as one of the most important railroad shops in the United States.
-
B.
Forney locomotive
The Forney locomotive is a compact 19th-century steam tank locomotive type, notable for its rigid wheelbase and rear-mounted fuel and water tanks, widely used on urban elevated and commuter railways.
-
C.
Standard Passenger Pacific of the PRR
The "Standard Passenger Pacific of the PRR" refers to the Pennsylvania Railroad’s K4s class, a highly successful and iconic 4-6-2 steam locomotive that became the railroad’s primary passenger engine in the early to mid-20th century.
-
D.
Locomotive Works
Locomotive Works is the section of the Derby railway works dedicated to the construction, maintenance, and repair of railway locomotives.
-
E.
Amtrak locomotives
Amtrak locomotives are the diesel and electric engines that power the United States’ national passenger rail services across both short- and long-distance routes.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NEDg
Description generation
gpt-5.1
Instruction
Generate a one-sentence description of the target entity. You are given a context triple in the form (subject, predicate, object), where the object is the target entity. # Instructions Use the triple to infer relevant information about the entity. Describe the entity based on what is most defining, well-known. Avoid repeating the information from the triple, unless really essential. # Response Format Return only the sentence: "Description: [one-sentence description of the target entity]"
Input
Entity: Pennsylvania Railroad locomotives Triple: [Pennsylvania Railroad Altoona Works, railroadShopFor, Pennsylvania Railroad locomotives]
Generated description
Pennsylvania Railroad locomotives were the diverse fleet of steam, electric, and diesel engines that powered one of the largest and most influential railroads in the United States throughout the late 19th and early 20th centuries.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Pennsylvania Railroad locomotives Target entity description: Pennsylvania Railroad locomotives were the diverse fleet of steam, electric, and diesel engines that powered one of the largest and most influential railroads in the United States throughout the late 19th and early 20th centuries.
-
A.
Pennsylvania Railroad Altoona Works
Pennsylvania Railroad Altoona Works was a major locomotive and railcar manufacturing and maintenance complex in Altoona, Pennsylvania, renowned as one of the most important railroad shops in the United States.
-
B.
Forney locomotive
The Forney locomotive is a compact 19th-century steam tank locomotive type, notable for its rigid wheelbase and rear-mounted fuel and water tanks, widely used on urban elevated and commuter railways.
-
C.
Standard Passenger Pacific of the PRR
chosen
The "Standard Passenger Pacific of the PRR" refers to the Pennsylvania Railroad’s K4s class, a highly successful and iconic 4-6-2 steam locomotive that became the railroad’s primary passenger engine in the early to mid-20th century.
-
D.
Locomotive Works
Locomotive Works is the section of the Derby railway works dedicated to the construction, maintenance, and repair of railway locomotives.
-
E.
Amtrak locomotives
Amtrak locomotives are the diesel and electric engines that power the United States’ national passenger rail services across both short- and long-distance routes.
- F. None of above.
PD
Predicate disambiguation
gpt-5-mini-2025-08-07
Target predicate: railroadShopFor Context triple: [Pennsylvania Railroad Altoona Works, railroadShopFor, Pennsylvania Railroad locomotives]
-
A.
railroadMet
Indicates that two or more railroads encountered or connected with each other at a specific place or time.
-
B.
railroad
Indicates that one entity constructs, operates, or provides railroad or train transportation services for another entity or area.
-
C.
railComponent
Indicates a relationship where one entity is a structural or functional part of a rail or railway system component of another entity.
-
D.
formerRailroad
Indicates that an entity was previously a railroad but no longer functions as one.
-
E.
rollingStockSupplier
chosen
Indicates that one entity supplies or provides rolling stock (such as railway vehicles) to another entity.
- F. None of above.
Provenance (6 batches)
The batch behind each pipeline step, in order, with when it ran. Timestamps are batch-level — stages were processed in waves, so the object chain (NER → NED1 → NEDg → NED2) reads in order, but predicate / elicitation batches can sit in a different wave.
| Step | Stage | Batch ID | Status | When |
|---|---|---|---|---|
| creating | Elicitation | batch_69ad85dc03948190b35b7189e4175bcc |
completed | March 8, 2026, 2:21 p.m. |
| NER | Named-entity recognition | batch_69adc2df2b708190afef6925a53ec551 |
completed | March 8, 2026, 6:41 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69b43328931881908bd92cb32a366e93 |
completed | March 13, 2026, 3:54 p.m. |
| NEDg | Description generation | batch_69b433a037588190a0629defe365515d |
completed | March 13, 2026, 3:56 p.m. |
| NED2 | Entity disambiguation (via description) | batch_69b437493384819084a7213fe754526b |
completed | March 13, 2026, 4:11 p.m. |
| PD | Predicate disambiguation | batch_69adb8410a5881909c94818d7060b2b0 |
completed | March 8, 2026, 5:56 p.m. |
Created at: March 8, 2026, 3:23 p.m.