Triple

T1091374

Position	Surface form	Disambiguated ID	Type / Status
Subject	Washington Metro Yellow Line	`E24170`	entity
Predicate	rollingStock	`P1305`	FINISHED
Object	WMATA 6000-series railcar The WMATA 6000-series railcar is a generation of Washington Metro rapid transit cars featuring modernized interiors, improved safety systems, and updated propulsion technology used across multiple lines in the system.	`E132571`	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: WMATA 6000-series railcar | Statement: [Washington Metro Yellow Line, rollingStock, WMATA 6000-series railcar]

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: WMATA 6000-series railcar
Context triple: [Washington Metro Yellow Line, rollingStock, WMATA 6000-series railcar]

A. WMATA 5000-series railcar
The WMATA 5000-series railcar is a generation of Washington Metro rapid transit cars built for improved performance and passenger amenities, used across multiple lines in the system.
B. WMATA 3000-series railcar
The WMATA 3000-series railcar is a generation of Washington Metro rapid transit vehicles used across multiple lines in the system, featuring stainless-steel construction and updated interiors compared to earlier series.
C. WMATA 2000-series railcar
The WMATA 2000-series railcar is a generation of Washington Metro rapid transit vehicles used across the system’s lines, featuring stainless-steel construction and updated interiors compared to earlier fleets.
D. MBTA Type 8 Light Rail Vehicle
The MBTA Type 8 Light Rail Vehicle is a low-floor, articulated streetcar used on Boston’s Green Line, designed to improve accessibility and passenger capacity on the system’s light rail routes.
E. MBTA Type 7 Light Rail Vehicle
The MBTA Type 7 Light Rail Vehicle is a high-floor, articulated streetcar used on Boston’s Green Line, known for its distinctive design and role as one of the system’s primary light rail fleets.
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: WMATA 6000-series railcar
Triple: [Washington Metro Yellow Line, rollingStock, WMATA 6000-series railcar]

Generated description

The WMATA 6000-series railcar is a generation of Washington Metro rapid transit cars featuring modernized interiors, improved safety systems, and updated propulsion technology used across multiple lines in the system.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: WMATA 6000-series railcar
Target entity description: The WMATA 6000-series railcar is a generation of Washington Metro rapid transit cars featuring modernized interiors, improved safety systems, and updated propulsion technology used across multiple lines in the system.

A. WMATA 5000-series railcar
The WMATA 5000-series railcar is a generation of Washington Metro rapid transit cars built for improved performance and passenger amenities, used across multiple lines in the system.
B. WMATA 3000-series railcar
The WMATA 3000-series railcar is a generation of Washington Metro rapid transit vehicles used across multiple lines in the system, featuring stainless-steel construction and updated interiors compared to earlier series.
C. WMATA 2000-series railcar
The WMATA 2000-series railcar is a generation of Washington Metro rapid transit vehicles used across the system’s lines, featuring stainless-steel construction and updated interiors compared to earlier fleets.
D. MBTA Type 8 Light Rail Vehicle
The MBTA Type 8 Light Rail Vehicle is a low-floor, articulated streetcar used on Boston’s Green Line, designed to improve accessibility and passenger capacity on the system’s light rail routes.
E. MBTA Type 7 Light Rail Vehicle
The MBTA Type 7 Light Rail Vehicle is a high-floor, articulated streetcar used on Boston’s Green Line, known for its distinctive design and role as one of the system’s primary light rail fleets.
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_69a49404428c819092dcc9632f5f7b8b`	completed	March 1, 2026, 7:31 p.m.
NER	Named-entity recognition	`batch_69a4b982018481908b222df095e318c0`	completed	March 1, 2026, 10:11 p.m.
NED1	Entity disambiguation (via context triple)	`batch_69ac5ea6cc888190b06f640a1e4a5147`	completed	March 7, 2026, 5:21 p.m.
NEDg	Description generation	`batch_69ac5f15c2808190905e40c6db9d957c`	completed	March 7, 2026, 5:23 p.m.
NED2	Entity disambiguation (via description)	`batch_69ac633749008190bae63644d5ee7cea`	completed	March 7, 2026, 5:41 p.m.

Created at: March 1, 2026, 7:42 p.m.