Triple
T19516942
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | British Rail Class 700 |
E488300
|
entity |
| Predicate | safetySystem |
P840
|
FINISHED |
| Object | ETCS Level 2 (on core route) |
—
|
NE NERFINISHED |
How this triple was built (2 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 2 (on core route) | Statement: [British Rail Class 700, safetySystem, ETCS Level 2 (on core route)]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: ETCS Level 2 (on core route) Context triple: [British Rail Class 700, safetySystem, ETCS Level 2 (on core route)]
-
A.
ETCS Level 2
chosen
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.
-
B.
ETCS Level 3
ETCS Level 3 is an advanced, moving-block train control standard that enables continuous train integrity supervision and higher line capacity within the European Train Control System.
-
C.
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.
-
D.
CTCS-2
CTCS-2 is a train control system level within the Chinese Train Control System hierarchy, providing a standardized, lower-tier signaling and control capability compared to CTCS-3.
-
E.
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.
- F. None of above.
- G. Unsure - the case is ambiguous/there is not enough information to decide.
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_69d8e8da8bec819081f400199491ccc3 |
completed | April 10, 2026, 12:11 p.m. |
| NER | Named-entity recognition | batch_69e6359ca7648190804c4d655170fda3 |
completed | April 20, 2026, 2:18 p.m. |
Created at: April 10, 2026, 1:40 p.m.