Triple

T7829420
Position Surface form Disambiguated ID Type / Status
Subject U.S. Naval Observatory Master Clock E181327 entity
Predicate alsoKnownAs P39 FINISHED
Object United States Naval Observatory Master Clock E181327 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: United States Naval Observatory Master Clock | Statement: [U.S. Naval Observatory Master Clock, alsoKnownAs, United States Naval Observatory Master Clock]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: United States Naval Observatory Master Clock
Context triple: [U.S. Naval Observatory Master Clock, alsoKnownAs, United States Naval Observatory Master Clock]
  • A. U.S. Naval Observatory Master Clock chosen
    The U.S. Naval Observatory Master Clock is the primary time standard of the United States, providing ultra-precise reference time for military, governmental, and global positioning system (GPS) operations.
  • B. International Atomic Time
    International Atomic Time is a high-precision time standard based on the combined output of atomic clocks worldwide, serving as the fundamental reference for modern civil and scientific timekeeping.
  • C. United States Naval Observatory Flagstaff Station
    The United States Naval Observatory Flagstaff Station is an astronomical observatory in Flagstaff, Arizona, operated by the U.S. Naval Observatory for high-precision astrometric and related observations.
  • D. cesium atomic clocks
    Cesium atomic clocks are ultra-precise timekeeping devices that use the microwave frequency of cesium atoms’ electron transitions to define and maintain the international standard for the second.
  • E. Larcum Kendall K1 chronometer
    The Larcum Kendall K1 chronometer was an 18th-century marine timekeeper, closely modeled on John Harrison’s H4, that famously demonstrated the practicality of accurate longitude determination at sea.
  • F. None of above.
  • G. Unsure - the case is ambiguous/there is not enough information to decide.

Provenance (3 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_69ca8282ccec819083c48efb72d21cf9 completed March 30, 2026, 2:02 p.m.
NER Named-entity recognition batch_69cb04aaed1881908e1da129a43ef9c7 completed March 30, 2026, 11:18 p.m.
NED1 Entity disambiguation (via context triple) batch_69cb5a854fac8190802599615a0f7bc4 completed March 31, 2026, 5:24 a.m.
Created at: March 30, 2026, 4:44 p.m.