Triple

T19368869

Position	Surface form	Disambiguated ID	Type / Status
Subject	Los Angeles Civic Center	`E484476`	entity
Predicate	servedBy	`P82`	FINISHED
Object	Los Angeles Metro Rail B Line The Los Angeles Metro Rail B Line is a heavy-rail subway line that runs through central Los Angeles, connecting key neighborhoods and downtown destinations as part of the city’s rapid transit system.	`E1372597`	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: Los Angeles Metro Rail B Line | Statement: [Los Angeles Civic Center, servedBy, Los Angeles Metro Rail B Line]

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

Target entity: Los Angeles Metro Rail B Line
Context triple: [Los Angeles Civic Center, servedBy, Los Angeles Metro Rail B Line]

A. Los Angeles Metro Gold Line
The Los Angeles Metro Gold Line is a light rail transit line in the Los Angeles County Metro Rail system that connects communities in the San Gabriel Valley and East Los Angeles to downtown Los Angeles.
B. Los Angeles Metro Green Line
The Los Angeles Metro Green Line is an east–west light rail line in Los Angeles County that runs primarily along the median of the I-105 freeway, connecting Norwalk to Redondo Beach and serving as part of the Los Angeles Metro Rail system.
C. Los Angeles Metro Rail
Los Angeles Metro Rail is a rapid transit system serving Los Angeles County, California, consisting of multiple light rail and subway lines that connect key neighborhoods, business districts, and regional destinations.
D. LA Metro A Line
The LA Metro A Line is a light rail line in Los Angeles County that connects downtown Los Angeles with several surrounding communities, including Pasadena and Long Beach.
E. Expo Line (Los Angeles Metro)
The Expo Line (Los Angeles Metro), now known as the E Line, is a light rail route in Los Angeles that connects Downtown Los Angeles to Santa Monica, serving major Westside neighborhoods and destinations.
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: Los Angeles Metro Rail B Line
Triple: [Los Angeles Civic Center, servedBy, Los Angeles Metro Rail B Line]

Generated description

The Los Angeles Metro Rail B Line is a heavy-rail subway line that runs through central Los Angeles, connecting key neighborhoods and downtown destinations as part of the city’s rapid transit system.

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

Target entity: Los Angeles Metro Rail B Line
Target entity description: The Los Angeles Metro Rail B Line is a heavy-rail subway line that runs through central Los Angeles, connecting key neighborhoods and downtown destinations as part of the city’s rapid transit system.

A. Los Angeles Metro Gold Line
The Los Angeles Metro Gold Line is a light rail transit line in the Los Angeles County Metro Rail system that connects communities in the San Gabriel Valley and East Los Angeles to downtown Los Angeles.
B. Los Angeles Metro Green Line
The Los Angeles Metro Green Line is an east–west light rail line in Los Angeles County that runs primarily along the median of the I-105 freeway, connecting Norwalk to Redondo Beach and serving as part of the Los Angeles Metro Rail system.
C. Los Angeles Metro Rail
Los Angeles Metro Rail is a rapid transit system serving Los Angeles County, California, consisting of multiple light rail and subway lines that connect key neighborhoods, business districts, and regional destinations.
D. LA Metro A Line
The LA Metro A Line is a light rail line in Los Angeles County that connects downtown Los Angeles with several surrounding communities, including Pasadena and Long Beach.
E. Expo Line (Los Angeles Metro)
The Expo Line (Los Angeles Metro), now known as the E Line, is a light rail route in Los Angeles that connects Downtown Los Angeles to Santa Monica, serving major Westside neighborhoods and destinations.
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_69d8e8d305088190ad13571532aa454c`	completed	April 10, 2026, 12:10 p.m.
NER	Named-entity recognition	`batch_69e619ae6838819080584d60cbd58bbd`	completed	April 20, 2026, 12:18 p.m.
NED1	Entity disambiguation (via context triple)	`batch_6a072419c4ec8190931c1918450f2a83`	completed	May 15, 2026, 1:48 p.m.
NEDg	Description generation	`batch_6a0725c32c4c8190bb29a764695cd245`	completed	May 15, 2026, 1:55 p.m.
NED2	Entity disambiguation (via description)	`batch_6a0726ea260c8190b97e2b18fde36272`	completed	May 15, 2026, 2 p.m.

Created at: April 10, 2026, 1:35 p.m.