Triple

T32405737

Position	Surface form	Disambiguated ID	Type / Status
Subject	Green Line A branch	`E828072`	entity
Predicate	precededBy	`P97`	FINISHED
Object	Boston Elevated Railway Watertown line The Boston Elevated Railway Watertown line was an early 20th-century streetcar route in the Boston area that later evolved into what became known as the Green Line A branch.	`E2005719`	NE FINISHED

How this triple was built (2 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: Boston Elevated Railway Watertown line | Statement: [Green Line A branch, precededBy, Boston Elevated Railway Watertown line]

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: Boston Elevated Railway Watertown line
Triple: [Green Line A branch, precededBy, Boston Elevated Railway Watertown line]

Generated description

The Boston Elevated Railway Watertown line was an early 20th-century streetcar route in the Boston area that later evolved into what became known as the Green Line A branch.

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_69f34919342c8190a4c3bf35a90d4e58`	completed	April 30, 2026, 12:20 p.m.
NER	Named-entity recognition	`batch_69f6c247928481908f5aa369adfd2906`	completed	May 3, 2026, 3:34 a.m.
NED1	Entity disambiguation (via context triple)	`batch_6a344f17e8d08190894ca377e48595c2`	completed	June 18, 2026, 8:03 p.m.
NEDg	Description generation	`batch_6a3453206fb081908b641a4a804eb814`	completed	June 18, 2026, 8:20 p.m.
NED2	Entity disambiguation (via description)	`batch_6a34538c05708190a42d883a62a92893`	completed	June 18, 2026, 8:22 p.m.

Created at: May 1, 2026, 12:53 a.m.