Triple

T5346600

Position	Surface form	Disambiguated ID	Type / Status
Subject	Brockton Area Transit Authority	`E124070`	entity
Predicate	isPartOf	`P10`	FINISHED
Object	Massachusetts regional transit authorities system The Massachusetts regional transit authorities system is a network of locally governed public transportation agencies that provide bus and paratransit services across regions outside the core MBTA service area in the state.	`E513179`	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: Massachusetts regional transit authorities system | Statement: [Brockton Area Transit Authority, isPartOf, Massachusetts regional transit authorities system]

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

Target entity: Massachusetts regional transit authorities system
Context triple: [Brockton Area Transit Authority, isPartOf, Massachusetts regional transit authorities system]

A. MBTA Commuter Rail network
The MBTA Commuter Rail network is a regional passenger rail system serving Greater Boston and surrounding communities in Massachusetts and parts of Rhode Island.
B. Philadelphia commuter rail network
The Philadelphia commuter rail network is a regional passenger rail system serving the greater Philadelphia area, primarily operated by SEPTA and connecting the city with its surrounding suburbs.
C. Regional Public Transportation Authority
The Regional Public Transportation Authority is the governing body that oversees and coordinates public transit services in the Phoenix metropolitan area, operating under the Valley Metro brand.
D. Metropolitan Transit System
The Metropolitan Transit System is the primary public transportation agency serving the San Diego region, operating buses, trolleys, and related transit services.
E. MBTA
The MBTA (Massachusetts Bay Transportation Authority) is the public transit agency that operates subway, bus, commuter rail, and ferry services in the Greater Boston area.
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: Massachusetts regional transit authorities system
Triple: [Brockton Area Transit Authority, isPartOf, Massachusetts regional transit authorities system]

Generated description

The Massachusetts regional transit authorities system is a network of locally governed public transportation agencies that provide bus and paratransit services across regions outside the core MBTA service area in the state.

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

Target entity: Massachusetts regional transit authorities system
Target entity description: The Massachusetts regional transit authorities system is a network of locally governed public transportation agencies that provide bus and paratransit services across regions outside the core MBTA service area in the state.

A. MBTA Commuter Rail network
The MBTA Commuter Rail network is a regional passenger rail system serving Greater Boston and surrounding communities in Massachusetts and parts of Rhode Island.
B. Philadelphia commuter rail network
The Philadelphia commuter rail network is a regional passenger rail system serving the greater Philadelphia area, primarily operated by SEPTA and connecting the city with its surrounding suburbs.
C. Regional Public Transportation Authority
The Regional Public Transportation Authority is the governing body that oversees and coordinates public transit services in the Phoenix metropolitan area, operating under the Valley Metro brand.
D. Metropolitan Transit System
The Metropolitan Transit System is the primary public transportation agency serving the San Diego region, operating buses, trolleys, and related transit services.
E. MBTA
The MBTA (Massachusetts Bay Transportation Authority) is the public transit agency that operates subway, bus, commuter rail, and ferry services in the Greater Boston area.
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_69bd464be27081908807b40b75c1bbae`	completed	March 20, 2026, 1:06 p.m.
NER	Named-entity recognition	`batch_69bd85ede7c481908347d557aa4d19ad`	completed	March 20, 2026, 5:37 p.m.
NED1	Entity disambiguation (via context triple)	`batch_69bf21c95ed0819084a9cdcaf5148988`	completed	March 21, 2026, 10:55 p.m.
NEDg	Description generation	`batch_69bf2236219c8190bd5c439ea13ea83a`	completed	March 21, 2026, 10:56 p.m.
NED2	Entity disambiguation (via description)	`batch_69bf229a0ad88190b7edc02a98f5fe31`	completed	March 21, 2026, 10:58 p.m.

Created at: March 20, 2026, 2:01 p.m.