Triple

T13669206
Position Surface form Disambiguated ID Type / Status
Subject Maradana railway station E327703 entity
Predicate partOf P40 FINISHED
Object Colombo urban rail network
The Colombo urban rail network is the suburban and commuter rail system serving Sri Lanka’s capital region, connecting central Colombo with its surrounding suburbs and key transit hubs.
 E1053186 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: Colombo urban rail network | Statement: [Maradana railway station, partOf, Colombo urban rail network]

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: Colombo urban rail network
Context triple: [Maradana railway station, partOf, Colombo urban rail network]
  • A. 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.
  • B. Colombo–Badulla railway line
    The Colombo–Badulla railway line is a scenic Sri Lankan rail route that winds through the island’s central highlands, connecting the capital region with the mountainous Up-Country area.
  • C. 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.
  • D. 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.
  • E. 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.
  • 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: Colombo urban rail network
Target entity description: The Colombo urban rail network is the suburban and commuter rail system serving Sri Lanka’s capital region, connecting central Colombo with its surrounding suburbs and key transit hubs.
  • A. 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.
  • B. Colombo–Badulla railway line
    The Colombo–Badulla railway line is a scenic Sri Lankan rail route that winds through the island’s central highlands, connecting the capital region with the mountainous Up-Country area.
  • C. 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.
  • D. 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.
  • E. 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.
  • 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: Colombo urban rail network
Triple: [Maradana railway station, partOf, Colombo urban rail network]
Generated description
The Colombo urban rail network is the suburban and commuter rail system serving Sri Lanka’s capital region, connecting central Colombo with its surrounding suburbs and key transit hubs.

Provenance (5 batches)

Stage Batch ID Job type Status
creating batch_69d8076f1fa8819094664a59b55010df elicitation completed
NER batch_69dbc65832688190aea688fee0a7cbdb ner completed
NED1 batch_69f78b0f56048190bcbc6581a8cdc0f5 ned_source_triple completed
NED2 batch_69f78d6f02c48190a8f3bc4cb71910a0 ned_description completed
NEDg batch_69f78c0030e481909c20f21ddaa480dc nedg completed
Created at: April 9, 2026, 9:53 p.m.