Triple
T23516635
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Production units of Indian Railways |
E574385
|
entity |
| Predicate | hasPart |
P35
|
FINISHED |
| Object | Perambur Carriage Works |
—
|
NE NERFINISHED |
How this triple was built (3 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: Perambur Carriage Works | Statement: [Production units of Indian Railways, hasPart, Perambur Carriage Works]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Perambur Carriage Works Context triple: [Production units of Indian Railways, hasPart, Perambur Carriage Works]
-
A.
Kanchrapara Railway Workshop
Kanchrapara Railway Workshop is a major Indian Railways maintenance and repair facility located in Kanchrapara, West Bengal, known for overhauling locomotives, coaches, and other rolling stock.
-
B.
Mytishchi Carriage Works
Mytishchi Carriage Works was a major Russian industrial plant known for producing railway rolling stock and later diversified machinery and equipment.
-
C.
Koyambedu depot
Koyambedu depot is a major maintenance, operations, and stabling facility serving the Chennai Metro rail network in Chennai, India.
-
D.
Jagadhri railway workshop
Jagadhri railway workshop is a major Indian Railways facility in Haryana dedicated to the maintenance and repair of railway rolling stock and related infrastructure.
-
E.
Challaghatta depot
Challaghatta depot is a major maintenance and stabling facility serving the Namma Metro system in Bengaluru, India.
- 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: Perambur Carriage Works Target entity description: Perambur Carriage Works is a major Indian Railways facility in Chennai specializing in the manufacturing, repair, and overhaul of railway coaches and related rolling stock.
-
A.
Kanchrapara Railway Workshop
Kanchrapara Railway Workshop is a major Indian Railways maintenance and repair facility located in Kanchrapara, West Bengal, known for overhauling locomotives, coaches, and other rolling stock.
-
B.
Mytishchi Carriage Works
Mytishchi Carriage Works was a major Russian industrial plant known for producing railway rolling stock and later diversified machinery and equipment.
-
C.
Koyambedu depot
Koyambedu depot is a major maintenance, operations, and stabling facility serving the Chennai Metro rail network in Chennai, India.
-
D.
Jagadhri railway workshop
Jagadhri railway workshop is a major Indian Railways facility in Haryana dedicated to the maintenance and repair of railway rolling stock and related infrastructure.
-
E.
Challaghatta depot
Challaghatta depot is a major maintenance and stabling facility serving the Namma Metro system in Bengaluru, India.
- F. None of above. chosen
Provenance (2 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_69e245bb3dcc8190ba9a2b35972b58d0 |
completed | April 17, 2026, 2:37 p.m. |
| NER | Named-entity recognition | batch_69f1aa82a8448190bf7ad56137c5eb94 |
completed | April 29, 2026, 6:51 a.m. |
Created at: April 17, 2026, 6:08 p.m.