Triple

T21018500
Position Surface form Disambiguated ID Type / Status
Subject Pontresina E517740 entity
Predicate railLine P848 FINISHED
Object Albula line (connection via Samedan)
The Albula line (connection via Samedan) is a segment of the Rhaetian Railway’s Albula route in the Swiss canton of Graubünden that links Pontresina to the main Albula corridor through the junction at Samedan.
 E1462894 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: Albula line (connection via Samedan) | Statement: [Pontresina, railLine, Albula line (connection via Samedan)]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Albula line (connection via Samedan)
Context triple: [Pontresina, railLine, Albula line (connection via Samedan)]
  • A. Landquart–Davos railway line
    The Landquart–Davos railway line is a Swiss metre-gauge mountain railway operated by the Rhaetian Railway, linking the town of Landquart with the alpine resort of Davos through the canton of Graubünden.
  • B. Furka–Oberalp line
    The Furka–Oberalp line is a historic Swiss metre-gauge mountain railway crossing the Alps between the cantons of Valais, Uri, and Graubünden, renowned for its steep gradients, scenic vistas, and partial operation as a heritage steam railway.
  • C. Brünig railway line
    The Brünig railway line is a scenic Swiss metre-gauge rail route operated by Zentralbahn that connects Lucerne and Interlaken across the Alps.
  • D. railway line Sargans–Landquart
    The Sargans–Landquart railway line is a Swiss rail route in the canton of St. Gallen and Graubünden that connects the important transport hubs of Sargans and Landquart within the national and regional rail network.
  • E. Brixentalbahn railway line
    The Brixentalbahn railway line is a regional rail route in the Austrian state of Tyrol that connects several towns in the Brixental valley and links them to the wider national rail network.
  • 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: Albula line (connection via Samedan)
Triple: [Pontresina, railLine, Albula line (connection via Samedan)]
Generated description
The Albula line (connection via Samedan) is a segment of the Rhaetian Railway’s Albula route in the Swiss canton of Graubünden that links Pontresina to the main Albula corridor through the junction at Samedan.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Albula line (connection via Samedan)
Target entity description: The Albula line (connection via Samedan) is a segment of the Rhaetian Railway’s Albula route in the Swiss canton of Graubünden that links Pontresina to the main Albula corridor through the junction at Samedan.
  • A. Landquart–Davos railway line
    The Landquart–Davos railway line is a Swiss metre-gauge mountain railway operated by the Rhaetian Railway, linking the town of Landquart with the alpine resort of Davos through the canton of Graubünden.
  • B. Furka–Oberalp line
    The Furka–Oberalp line is a historic Swiss metre-gauge mountain railway crossing the Alps between the cantons of Valais, Uri, and Graubünden, renowned for its steep gradients, scenic vistas, and partial operation as a heritage steam railway.
  • C. Brünig railway line
    The Brünig railway line is a scenic Swiss metre-gauge rail route operated by Zentralbahn that connects Lucerne and Interlaken across the Alps.
  • D. railway line Sargans–Landquart
    The Sargans–Landquart railway line is a Swiss rail route in the canton of St. Gallen and Graubünden that connects the important transport hubs of Sargans and Landquart within the national and regional rail network.
  • E. Brixentalbahn railway line
    The Brixentalbahn railway line is a regional rail route in the Austrian state of Tyrol that connects several towns in the Brixental valley and links them to the wider national rail network.
  • 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_69e0b50262b081909bc488937145eb73 completed April 16, 2026, 10:08 a.m.
NER Named-entity recognition batch_69e6fc5a27f08190b26828a6a7b59f7c completed April 21, 2026, 4:26 a.m.
NED1 Entity disambiguation (via context triple) batch_6a093b67103081908033c57e586afa69 completed May 17, 2026, 3:52 a.m.
NEDg Description generation batch_6a0940b362388190a78a244eafa7cbba completed May 17, 2026, 4:14 a.m.
NED2 Entity disambiguation (via description) batch_6a09414912d88190b7da0186ef7b227f completed May 17, 2026, 4:17 a.m.
Created at: April 16, 2026, 1:54 p.m.