Triple
T15244020
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Meridian Column |
E364331
|
entity |
| Predicate | partOf |
P40
|
FINISHED |
| Object | Struve Geodetic Arc |
E970545
|
NE FINISHED |
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: Struve Geodetic Arc | Statement: [Meridian Column, partOf, Struve Geodetic Arc]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Struve Geodetic Arc Context triple: [Meridian Column, partOf, Struve Geodetic Arc]
-
A.
Struve Geodetic Arc
chosen
The Struve Geodetic Arc is a chain of survey triangulation points stretching from Norway to the Black Sea, established in the 19th century to measure the exact size and shape of the Earth and now recognized as a UNESCO World Heritage Site.
-
B.
Humboldt meridian
The Humboldt meridian is a principal survey meridian used as a reference line for land surveying and mapping in parts of northern California.
-
C.
Cassini meridian line
The Cassini meridian line is a monumental 17th-century astronomical sundial and meridian marker in Bologna used to measure the Sun’s position and refine the length of the year.
-
D.
Great Arc of the Meridian
The Great Arc of the Meridian was a monumental 19th-century geodetic survey line across the Indian subcontinent that played a key role in measuring the Earth’s shape and refining global maps.
-
E.
geodetic survey of the Struve Geodetic Arc
The geodetic survey of the Struve Geodetic Arc was a 19th-century multinational triangulation project that precisely measured a meridian arc across Northern Europe to determine the size and shape of the Earth.
- F. None of above.
- G. Unsure - the case is ambiguous/there is not enough information to decide.
Provenance (3 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_69d85a0dde7481908fc64d1e82d5d20d |
completed | April 10, 2026, 2:01 a.m. |
| NER | Named-entity recognition | batch_69e007f306f08190be448b215d6c9b6c |
completed | April 15, 2026, 9:49 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69fedd461cf08190a506aac2f0cec83a |
completed | May 9, 2026, 7:07 a.m. |
Created at: April 10, 2026, 3:13 a.m.