Triple

T4272193

Position	Surface form	Disambiguated ID	Type / Status
Subject	Parker Dam	`E96965`	entity
Predicate	suppliesWaterTo	`P4102`	FINISHED
Object	Metropolitan Water District of Southern California The Metropolitan Water District of Southern California is a regional wholesale water agency that imports, manages, and distributes water supplies to numerous cities and local water districts across Southern California.	`E427265`	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: Metropolitan Water District of Southern California | Statement: [Parker Dam, suppliesWaterTo, Metropolitan Water District of Southern California]

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

Target entity: Metropolitan Water District of Southern California
Context triple: [Parker Dam, suppliesWaterTo, Metropolitan Water District of Southern California]

A. Mojave Water Agency
The Mojave Water Agency is a regional water management and planning agency in Southern California responsible for securing, conserving, and overseeing water resources for communities in the Mojave Desert region.
B. Los Angeles Department of Water and Power
The Los Angeles Department of Water and Power is the largest municipal utility in the United States, providing water and electricity to the City of Los Angeles and overseeing key regional water resources.
C. Contra Costa Water District
Contra Costa Water District is a public water agency in California that supplies drinking and irrigation water to communities in and around Contra Costa County.
D. Valley Water
Valley Water is a picturesque pond located within Brooklyn’s historic Green-Wood Cemetery, known for its tranquil scenery and surrounding monuments.
E. Santa Clara Valley Water District
Santa Clara Valley Water District is the public agency responsible for managing water supply, flood protection, and stream stewardship for Santa Clara County in California’s Silicon Valley.
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: Metropolitan Water District of Southern California
Triple: [Parker Dam, suppliesWaterTo, Metropolitan Water District of Southern California]

Generated description

The Metropolitan Water District of Southern California is a regional wholesale water agency that imports, manages, and distributes water supplies to numerous cities and local water districts across Southern California.

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

Target entity: Metropolitan Water District of Southern California
Target entity description: The Metropolitan Water District of Southern California is a regional wholesale water agency that imports, manages, and distributes water supplies to numerous cities and local water districts across Southern California.

A. Mojave Water Agency
The Mojave Water Agency is a regional water management and planning agency in Southern California responsible for securing, conserving, and overseeing water resources for communities in the Mojave Desert region.
B. Los Angeles Department of Water and Power
The Los Angeles Department of Water and Power is the largest municipal utility in the United States, providing water and electricity to the City of Los Angeles and overseeing key regional water resources.
C. Contra Costa Water District
Contra Costa Water District is a public water agency in California that supplies drinking and irrigation water to communities in and around Contra Costa County.
D. Valley Water
Valley Water is a picturesque pond located within Brooklyn’s historic Green-Wood Cemetery, known for its tranquil scenery and surrounding monuments.
E. Santa Clara Valley Water District
Santa Clara Valley Water District is the public agency responsible for managing water supply, flood protection, and stream stewardship for Santa Clara County in California’s Silicon Valley.
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_69b34543f06c8190915ebb1a4574ffa9`	completed	March 12, 2026, 10:59 p.m.
NER	Named-entity recognition	`batch_69b34ffce3d8819083d2278547fa52c1`	completed	March 12, 2026, 11:45 p.m.
NED1	Entity disambiguation (via context triple)	`batch_69b5b7a7fbe0819080076b8d8e4c3bbe`	completed	March 14, 2026, 7:31 p.m.
NEDg	Description generation	`batch_69b5b84b58a081909618d0c108317f92`	completed	March 14, 2026, 7:34 p.m.
NED2	Entity disambiguation (via description)	`batch_69b5b8c3fb208190b091da57f7b1f704`	completed	March 14, 2026, 7:36 p.m.

Created at: March 12, 2026, 11:07 p.m.