Triple

T2187672

Position	Surface form	Disambiguated ID	Type / Status
Subject	Encino, Los Angeles, California, United States	`E49187`	entity
Predicate	hasRecreationArea	`P5383`	FINISHED
Object	Sepulveda Basin Recreation Area (adjacent) Sepulveda Basin Recreation Area (adjacent) is a large urban park and wildlife and flood-control basin in the San Fernando Valley offering extensive outdoor recreation, sports facilities, and natural open space.	`E242234`	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: Sepulveda Basin Recreation Area (adjacent) | Statement: [Encino, Los Angeles, California, United States, hasRecreationArea, Sepulveda Basin Recreation Area (adjacent)]

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

Target entity: Sepulveda Basin Recreation Area (adjacent)
Context triple: [Encino, Los Angeles, California, United States, hasRecreationArea, Sepulveda Basin Recreation Area (adjacent)]

A. Crystal Basin Recreation Area
Crystal Basin Recreation Area is a popular outdoor destination in California’s Sierra Nevada offering camping, hiking, boating, and fishing around a series of mountain lakes and reservoirs.
B. Del Valle Regional Park
Del Valle Regional Park is a popular East Bay park in California known for its large reservoir, outdoor recreation opportunities, and scenic rolling hills.
C. Round Valley Recreation Area
Round Valley Recreation Area is a popular New Jersey state recreation site known for its deep reservoir, camping, hiking, fishing, and other outdoor activities.
D. Coyote Hills Regional Park
Coyote Hills Regional Park is a scenic East Bay regional park in Fremont, California, known for its rolling hills, wetlands, wildlife viewing, and extensive hiking and biking trails along the San Francisco Bay.
E. Echo Canyon State Park
Echo Canyon State Park is a scenic Nevada state park known for its reservoir, dramatic rock formations, and opportunities for camping, fishing, and hiking in a rugged desert canyon setting.
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: Sepulveda Basin Recreation Area (adjacent)
Triple: [Encino, Los Angeles, California, United States, hasRecreationArea, Sepulveda Basin Recreation Area (adjacent)]

Generated description

Sepulveda Basin Recreation Area (adjacent) is a large urban park and wildlife and flood-control basin in the San Fernando Valley offering extensive outdoor recreation, sports facilities, and natural open space.

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

Target entity: Sepulveda Basin Recreation Area (adjacent)
Target entity description: Sepulveda Basin Recreation Area (adjacent) is a large urban park and wildlife and flood-control basin in the San Fernando Valley offering extensive outdoor recreation, sports facilities, and natural open space.

A. Crystal Basin Recreation Area
Crystal Basin Recreation Area is a popular outdoor destination in California’s Sierra Nevada offering camping, hiking, boating, and fishing around a series of mountain lakes and reservoirs.
B. Del Valle Regional Park
Del Valle Regional Park is a popular East Bay park in California known for its large reservoir, outdoor recreation opportunities, and scenic rolling hills.
C. Round Valley Recreation Area
Round Valley Recreation Area is a popular New Jersey state recreation site known for its deep reservoir, camping, hiking, fishing, and other outdoor activities.
D. Coyote Hills Regional Park
Coyote Hills Regional Park is a scenic East Bay regional park in Fremont, California, known for its rolling hills, wetlands, wildlife viewing, and extensive hiking and biking trails along the San Francisco Bay.
E. Echo Canyon State Park
Echo Canyon State Park is a scenic Nevada state park known for its reservoir, dramatic rock formations, and opportunities for camping, fishing, and hiking in a rugged desert canyon setting.
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_69a88aa72d348190a9544bb5b8a4e71d`	completed	March 4, 2026, 7:40 p.m.
NER	Named-entity recognition	`batch_69abbf130ef081908adb4a22f056be5b`	completed	March 7, 2026, 6 a.m.
NED1	Entity disambiguation (via context triple)	`batch_69ae5dada268819082ddc4acd58e19f3`	completed	March 9, 2026, 5:42 a.m.
NEDg	Description generation	`batch_69ae5e5fe37c8190bcf73200d32f5faa`	completed	March 9, 2026, 5:45 a.m.
NED2	Entity disambiguation (via description)	`batch_69ae5ed1e3208190b46d5e8361c2a5f6`	completed	March 9, 2026, 5:46 a.m.

Created at: March 4, 2026, 7:45 p.m.