Triple

T15228095
Position Surface form Disambiguated ID Type / Status
Subject Pike expedition to the headwaters of the Mississippi River E363927 entity
Predicate mistakenIdentification P49451 FINISHED
Object Cass Lake as the source of the Mississippi River E211300 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: Cass Lake as the source of the Mississippi River | Statement: [Pike expedition to the headwaters of the Mississippi River, mistakenIdentification, Cass Lake as the source of the Mississippi River]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Cass Lake as the source of the Mississippi River
Context triple: [Pike expedition to the headwaters of the Mississippi River, mistakenIdentification, Cass Lake as the source of the Mississippi River]
  • A. Lake Itasca chosen
    Lake Itasca is a small glacial lake in northern Minnesota best known as the headwaters of the Mississippi River.
  • B. Minnesota River
    The Minnesota River is a major tributary of the Mississippi River in southern Minnesota, flowing through agricultural and prairie landscapes before joining the Mississippi near the Twin Cities.
  • C. Menominee River
    The Menominee River is a major river forming part of the border between Wisconsin and Michigan’s Upper Peninsula, known for its forests, hydroelectric dams, and role as a key tributary in the Great Lakes watershed.
  • D. Root River (Minnesota)
    Root River is a scenic waterway in southeastern Minnesota known for its limestone bluffs, recreational paddling, and trout fishing.
  • E. St. Croix River at Stillwater, Minnesota
    The St. Croix River at Stillwater, Minnesota is a scenic stretch of the St. Croix River that forms part of the Minnesota–Wisconsin border and is a focal point for recreation, tourism, and riverfront activity in the historic city of Stillwater.
  • 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_69d85a0ce24c81909c4d3b6475548c95 completed April 10, 2026, 2:01 a.m.
NER Named-entity recognition batch_69e0078ccdf48190b34eabd9e24e45a1 completed April 15, 2026, 9:47 p.m.
NED1 Entity disambiguation (via context triple) batch_69fedd379ac081909ebb3a18c2ee3b3c completed May 9, 2026, 7:07 a.m.
Created at: April 10, 2026, 3:12 a.m.