Triple

T12982880
Position Surface form Disambiguated ID Type / Status
Subject Sri Lanka Railways E321694 entity
Predicate operatesLine P15252 FINISHED
Object Eastern Line (Sri Lanka)
Eastern Line (Sri Lanka) is a major railway route in Sri Lanka that connects the island’s eastern regions with the national rail network, serving key towns and facilitating passenger and freight transport.
 E1020848 NE FINISHED

Named-entity recognition

Before disambiguation, gpt-5-mini classified whether the object phrase is a named entity — the step behind the object's NE type shown above.

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: Eastern Line (Sri Lanka) | Statement: [Sri Lanka Railways, operatesLine, Eastern Line (Sri Lanka)]

Disambiguation candidates (2 decisions)

The exact options the model was shown at each disambiguation step, with the option it chose highlighted — the evidence behind this triple's disambiguated ids.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Eastern Line (Sri Lanka)
Context triple: [Sri Lanka Railways, operatesLine, Eastern Line (Sri Lanka)]
  • A. Northern Line (Sri Lanka)
    The Northern Line (Sri Lanka) is a major railway route that connects Colombo with the northern regions of Sri Lanka, including the city of Jaffna, serving as a key corridor for passenger and freight transport.
  • B. Puttalam Line
    The Puttalam Line is a major railway line in Sri Lanka that runs along the island’s western coast, serving towns and industrial areas between Colombo and Puttalam.
  • C. Main Line (Sri Lanka)
    Main Line (Sri Lanka) is a major railway route running inland from Colombo through the central highlands, serving as one of the country’s primary passenger and freight corridors.
  • D. Colombo–Matara railway line
    The Colombo–Matara railway line is a coastal rail route in southwestern Sri Lanka that connects the capital region with major southern cities, including Galle and Matara.
  • E. Colombo–Trincomalee route
    The Colombo–Trincomalee route is a major intercity railway line in Sri Lanka connecting the capital Colombo with the eastern port city of Trincomalee.
  • F. None of above. chosen
  • G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Eastern Line (Sri Lanka)
Target entity description: Eastern Line (Sri Lanka) is a major railway route in Sri Lanka that connects the island’s eastern regions with the national rail network, serving key towns and facilitating passenger and freight transport.
  • A. Northern Line (Sri Lanka)
    The Northern Line (Sri Lanka) is a major railway route that connects Colombo with the northern regions of Sri Lanka, including the city of Jaffna, serving as a key corridor for passenger and freight transport.
  • B. Puttalam Line
    The Puttalam Line is a major railway line in Sri Lanka that runs along the island’s western coast, serving towns and industrial areas between Colombo and Puttalam.
  • C. Main Line (Sri Lanka)
    Main Line (Sri Lanka) is a major railway route running inland from Colombo through the central highlands, serving as one of the country’s primary passenger and freight corridors.
  • D. Colombo–Matara railway line
    The Colombo–Matara railway line is a coastal rail route in southwestern Sri Lanka that connects the capital region with major southern cities, including Galle and Matara.
  • E. Colombo–Trincomalee route
    The Colombo–Trincomalee route is a major intercity railway line in Sri Lanka connecting the capital Colombo with the eastern port city of Trincomalee.
  • F. None of above. chosen

How the object was described

The object's one-sentence description was generated by prompting gpt-5.1 with the object name and this triple as context.

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: Eastern Line (Sri Lanka)
Triple: [Sri Lanka Railways, operatesLine, Eastern Line (Sri Lanka)]
Generated description
Eastern Line (Sri Lanka) is a major railway route in Sri Lanka that connects the island’s eastern regions with the national rail network, serving key towns and facilitating passenger and freight transport.

Provenance (5 batches)

Stage Batch ID Job type Status
creating batch_69d8076479b8819090afce3591939cdf elicitation completed
NER batch_69d97e5ca33481909a6cb06c636889f9 ner completed
NED1 batch_69f6d5f4bedc81909b8dfa79a842e12d ned_source_triple completed
NED2 batch_69f6daeae96081908f6d9cda3ff7f961 ned_description completed
NEDg batch_69f6da5695508190a96ca16a4e5c01ee nedg completed
Created at: April 9, 2026, 8:39 p.m.