Triple

T13305368
Position Surface form Disambiguated ID Type / Status
Subject Mamaroneck Harbor E316921 entity
Predicate receivesInflowFrom P967 FINISHED
Object Mamaroneck River
The Mamaroneck River is a small coastal river in Westchester County, New York, that flows through suburban communities before emptying into Long Island Sound.
 E1065057 NE FINISHED

Named-entity recognition

Before disambiguation, gpt-5-mini classified whether the object phrase is a named entity — the step behind the object's NE type shown above.

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: Mamaroneck River | Statement: [Mamaroneck Harbor, receivesInflowFrom, Mamaroneck River]

Disambiguation candidates (2 decisions)

The exact options the model was shown at each disambiguation step, with the option it chose highlighted — the evidence behind this triple's disambiguated ids.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Mamaroneck River
Context triple: [Mamaroneck Harbor, receivesInflowFrom, Mamaroneck River]
  • A. Pocantico River
    The Pocantico River is a small river in Westchester County, New York, that flows through the Rockefeller family’s historic estate and into the Hudson River near Sleepy Hollow.
  • B. Saw Mill River
    Saw Mill River is a tributary of the Hudson River in southeastern New York, flowing through urban and suburban communities in Westchester County.
  • C. Wappinger Creek
    Wappinger Creek is a significant Hudson River tributary in Dutchess County, New York, known for flowing through communities such as Wappingers Falls and supporting local recreation and ecosystems.
  • D. Westchester Creek
    Westchester Creek is a tidal inlet and tributary of the East River located in the Bronx, New York City.
  • E. Whippany River
    The Whippany River is a tributary waterway in northern New Jersey that flows through Morris County before joining the Passaic River.
  • F. None of above. chosen
  • G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Mamaroneck River
Target entity description: The Mamaroneck River is a small coastal river in Westchester County, New York, that flows through suburban communities before emptying into Long Island Sound.
  • A. Pocantico River
    The Pocantico River is a small river in Westchester County, New York, that flows through the Rockefeller family’s historic estate and into the Hudson River near Sleepy Hollow.
  • B. Saw Mill River
    Saw Mill River is a tributary of the Hudson River in southeastern New York, flowing through urban and suburban communities in Westchester County.
  • C. Wappinger Creek
    Wappinger Creek is a significant Hudson River tributary in Dutchess County, New York, known for flowing through communities such as Wappingers Falls and supporting local recreation and ecosystems.
  • D. Westchester Creek
    Westchester Creek is a tidal inlet and tributary of the East River located in the Bronx, New York City.
  • E. Whippany River
    The Whippany River is a tributary waterway in northern New Jersey that flows through Morris County before joining the Passaic River.
  • F. None of above. chosen

How the object was described

The object's one-sentence description was generated by prompting gpt-5.1 with the object name and this triple as context.

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: Mamaroneck River
Triple: [Mamaroneck Harbor, receivesInflowFrom, Mamaroneck River]
Generated description
The Mamaroneck River is a small coastal river in Westchester County, New York, that flows through suburban communities before emptying into Long Island Sound.

Provenance (5 batches)

Stage Batch ID Job type Status
creating batch_69d806b40ab4819094adf6c374f4811a elicitation completed
NER batch_69d990a76adc8190ab9abcdb79a21ca8 ner completed
NED1 batch_69f7c0d3cf3881908fdfc56bd31e5fe2 ned_source_triple completed
NED2 batch_69f7c21231f48190ae6e2bdb2bbc0afd ned_description completed
NEDg batch_69f7c18a032481909fc1e97883062170 nedg completed
Created at: April 9, 2026, 9:28 p.m.