Triple
T15244023
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Meridian Column |
E364331
|
entity |
| Predicate | commemorates |
P501
|
FINISHED |
| Object | Struve Geodetic Arc measurements |
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 measurements | Statement: [Meridian Column, commemorates, Struve Geodetic Arc measurements]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Struve Geodetic Arc measurements Context triple: [Meridian Column, commemorates, Struve Geodetic Arc measurements]
-
A.
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.
-
B.
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.
-
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.
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.
-
E.
French Geodesic Mission to Lapland
The French Geodesic Mission to Lapland was an 18th-century scientific expedition that measured a meridian arc near the Arctic Circle to test the Earth's shape and confirm Newton's theory of an oblate spheroid.
- 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.