Triple

T502857
Position Surface form Disambiguated ID Type / Status
Subject Peninsula Corridor Joint Powers Board E10436 entity
Predicate alsoKnownAs P39 FINISHED
Object PCJPB
PCJPB is the Peninsula Corridor Joint Powers Board, the public agency that owns and oversees the Caltrain commuter rail service on the San Francisco Peninsula.
 E62426 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: PCJPB | Statement: [Peninsula Corridor Joint Powers Board, alsoKnownAs, PCJPB]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: PCJPB
Context triple: [Peninsula Corridor Joint Powers Board, alsoKnownAs, PCJPB]
  • A. PB
    PB is the post-nominal abbreviation used to denote recipients of the Padma Bhushan, one of India’s highest civilian honors.
  • B. JPVT
    JPVT is the standard abbreviation for the ASME Journal of Pressure Vessel Technology, a peer-reviewed journal focusing on research and developments in pressure vessel and piping engineering.
  • C. PCD
    PCD is a U.S. Army facility in Colorado that stored and oversaw the destruction of chemical weapons as part of the nation’s chemical demilitarization program.
  • D. CPC
    CPC is the commonly used English abbreviation for the Chinese Communist Party, the founding and ruling political party of the People's Republic of China.
  • E. NCP
    NCP (Network Control Protocol) was an early host-to-host communication protocol suite that enabled data exchange between computers on the ARPANET before the adoption of TCP/IP.
  • 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: PCJPB
Triple: [Peninsula Corridor Joint Powers Board, alsoKnownAs, PCJPB]
Generated description
PCJPB is the Peninsula Corridor Joint Powers Board, the public agency that owns and oversees the Caltrain commuter rail service on the San Francisco Peninsula.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: PCJPB
Target entity description: PCJPB is the Peninsula Corridor Joint Powers Board, the public agency that owns and oversees the Caltrain commuter rail service on the San Francisco Peninsula.
  • A. PB
    PB is the post-nominal abbreviation used to denote recipients of the Padma Bhushan, one of India’s highest civilian honors.
  • B. JPVT
    JPVT is the standard abbreviation for the ASME Journal of Pressure Vessel Technology, a peer-reviewed journal focusing on research and developments in pressure vessel and piping engineering.
  • C. PCD
    PCD is a U.S. Army facility in Colorado that stored and oversaw the destruction of chemical weapons as part of the nation’s chemical demilitarization program.
  • D. CPC
    CPC is the commonly used English abbreviation for the Chinese Communist Party, the founding and ruling political party of the People's Republic of China.
  • E. NCP
    NCP (Network Control Protocol) was an early host-to-host communication protocol suite that enabled data exchange between computers on the ARPANET before the adoption of TCP/IP.
  • 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_69a2e848adf881908e5e04f7af030093 completed Feb. 28, 2026, 1:06 p.m.
NER Named-entity recognition batch_69a2f1339748819089f89691a1698dd9 completed Feb. 28, 2026, 1:44 p.m.
NED1 Entity disambiguation (via context triple) batch_69a4854692348190b87efc0d4559f63f completed March 1, 2026, 6:28 p.m.
NEDg Description generation batch_69a485da078c819098bc4a2bca818d5e completed March 1, 2026, 6:30 p.m.
NED2 Entity disambiguation (via description) batch_69a486416de48190864ed2874556f5ef completed March 1, 2026, 6:32 p.m.
Created at: Feb. 28, 2026, 1:12 p.m.