Triple
T9269947
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | European Train Control System |
E222798
|
entity |
| Predicate | hasLevel |
P2393
|
FINISHED |
| Object |
ETCS Level 1
ETCS Level 1 is a standardized European train control and signaling system level that uses trackside equipment and intermittent data transmission to supervise train speed and movement authority.
|
E790240
|
NE FINISHED |
How this triple was built (4 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: ETCS Level 1 | Statement: [European Train Control System, hasLevel, ETCS Level 1]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: ETCS Level 1 Context triple: [European Train Control System, hasLevel, ETCS Level 1]
-
A.
ETCS Level 0
ETCS Level 0 is the baseline operating mode in the European Train Control System in which trains run without continuous ETCS supervision, typically relying on existing national signalling systems.
-
B.
ETCS Level 2
ETCS Level 2 is an advanced European train control and signalling standard that enables continuous, cab-based train supervision and high-speed, high-capacity railway operations.
-
C.
European Train Control System
The European Train Control System (ETCS) is a standardized, interoperable train signaling and control system used across Europe and in high-speed railways worldwide to enhance safety and efficiency.
-
D.
Siemens Trainguard MT
Siemens Trainguard MT is a communications-based train control (CBTC) signaling system developed by Siemens for fully automated and driverless metro and urban rail operations.
-
E.
CBTC
CBTC (Communications-Based Train Control) is an advanced railway signalling system that uses continuous, high-capacity data communication to manage train movements with greater safety and efficiency.
- 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: ETCS Level 1 Triple: [European Train Control System, hasLevel, ETCS Level 1]
Generated description
ETCS Level 1 is a standardized European train control and signaling system level that uses trackside equipment and intermittent data transmission to supervise train speed and movement authority.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: ETCS Level 1 Target entity description: ETCS Level 1 is a standardized European train control and signaling system level that uses trackside equipment and intermittent data transmission to supervise train speed and movement authority.
-
A.
ETCS Level 0
ETCS Level 0 is the baseline operating mode in the European Train Control System in which trains run without continuous ETCS supervision, typically relying on existing national signalling systems.
-
B.
ETCS Level 2
ETCS Level 2 is an advanced European train control and signalling standard that enables continuous, cab-based train supervision and high-speed, high-capacity railway operations.
-
C.
European Train Control System
The European Train Control System (ETCS) is a standardized, interoperable train signaling and control system used across Europe and in high-speed railways worldwide to enhance safety and efficiency.
-
D.
Siemens Trainguard MT
Siemens Trainguard MT is a communications-based train control (CBTC) signaling system developed by Siemens for fully automated and driverless metro and urban rail operations.
-
E.
CBTC
CBTC (Communications-Based Train Control) is an advanced railway signalling system that uses continuous, high-capacity data communication to manage train movements with greater safety and efficiency.
- F. None of above. chosen
Provenance (5 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_69ca841ffe208190aa7bcffbef2f8379 |
completed | March 30, 2026, 2:09 p.m. |
| NER | Named-entity recognition | batch_69cd078525308190abfb883123742d3f |
completed | April 1, 2026, 11:54 a.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69d0b1ecfadc81909adf95fbbc77c389 |
completed | April 4, 2026, 6:38 a.m. |
| NEDg | Description generation | batch_69d0b3f4bb6c819082d3f801ad88304f |
completed | April 4, 2026, 6:47 a.m. |
| NED2 | Entity disambiguation (via description) | batch_69d0b4b8131c8190b2aa8be56925b7bc |
completed | April 4, 2026, 6:50 a.m. |
Created at: March 30, 2026, 7:33 p.m.