Triple

T9271020
Position Surface form Disambiguated ID Type / Status
Subject Lowell Line E222827 entity
Predicate usesStation P726 FINISHED
Object Mystic Valley Parkway station (planned)
Mystic Valley Parkway station (planned) is a proposed commuter rail stop on the MBTA’s Lowell Line intended to serve the Medford area north of Boston.
 E789073 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: Mystic Valley Parkway station (planned) | Statement: [Lowell Line, usesStation, Mystic Valley Parkway station (planned)]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Mystic Valley Parkway station (planned)
Context triple: [Lowell Line, usesStation, Mystic Valley Parkway station (planned)]
  • A. Spring Valley station
    Spring Valley station is a commuter rail station in Spring Valley, New York, serving as a terminus and key stop for regional passenger service in the area.
  • B. Spring Valley station
    Spring Valley station is a Dallas Area Rapid Transit (DART) light rail stop in the Dallas–Fort Worth area served by the system’s Red Line.
  • C. Valley Road station
    Valley Road station is a small light rail stop on the MBTA's Mattapan trolley line in Milton, Massachusetts.
  • D. Pingree Road station
    Pingree Road station is a Metra commuter rail stop serving the city of Crystal Lake in McHenry County, Illinois.
  • E. Daybreak Parkway station
    Daybreak Parkway station is a light rail stop on Utah's TRAX system serving the Daybreak community in South Jordan.
  • 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: Mystic Valley Parkway station (planned)
Triple: [Lowell Line, usesStation, Mystic Valley Parkway station (planned)]
Generated description
Mystic Valley Parkway station (planned) is a proposed commuter rail stop on the MBTA’s Lowell Line intended to serve the Medford area north of Boston.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Mystic Valley Parkway station (planned)
Target entity description: Mystic Valley Parkway station (planned) is a proposed commuter rail stop on the MBTA’s Lowell Line intended to serve the Medford area north of Boston.
  • A. Spring Valley station
    Spring Valley station is a commuter rail station in Spring Valley, New York, serving as a terminus and key stop for regional passenger service in the area.
  • B. Spring Valley station
    Spring Valley station is a Dallas Area Rapid Transit (DART) light rail stop in the Dallas–Fort Worth area served by the system’s Red Line.
  • C. Valley Road station
    Valley Road station is a small light rail stop on the MBTA's Mattapan trolley line in Milton, Massachusetts.
  • D. Pingree Road station
    Pingree Road station is a Metra commuter rail stop serving the city of Crystal Lake in McHenry County, Illinois.
  • E. Daybreak Parkway station
    Daybreak Parkway station is a light rail stop on Utah's TRAX system serving the Daybreak community in South Jordan.
  • 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_69ca841ffe208190aa7bcffbef2f8379 completed March 30, 2026, 2:09 p.m.
NER Named-entity recognition batch_69cd07865790819099b3865a25dae58a completed April 1, 2026, 11:54 a.m.
NED1 Entity disambiguation (via context triple) batch_69d09c2ca500819083ef4aa37f3e3a7f completed April 4, 2026, 5:05 a.m.
NEDg Description generation batch_69d09d5047e8819082dbb2e44547b41c completed April 4, 2026, 5:10 a.m.
NED2 Entity disambiguation (via description) batch_69d09dec544c819095e2109d5e1671d3 completed April 4, 2026, 5:13 a.m.
Created at: March 30, 2026, 7:33 p.m.