John Harrison
E371696
John Harrison was an 18th-century English clockmaker renowned for inventing marine chronometers that solved the problem of determining longitude at sea.
All labels observed (4)
| Label | Occurrences |
|---|---|
| John Harrison canonical | 4 |
| Harrison marine chronometers | 1 |
| John Harrison (clockmaker) | 1 |
| John Harrison H4 marine timekeeper | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3589721 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: John Harrison Context triple: [Harrison, hasNotableBearer, John Harrison]
-
A.
James Bradley
James Bradley was an 18th-century English astronomer best known for discovering the aberration of starlight and providing strong evidence for the Earth's motion around the Sun.
-
B.
Sandford Fleming
Sandford Fleming was a Scottish-born Canadian engineer and inventor best known for proposing worldwide standard time zones and contributing significantly to Canada's railway development.
-
C.
John Flamsteed
John Flamsteed was a 17th–18th century English astronomer best known as the first Astronomer Royal and for his foundational star cataloguing work.
-
D.
Charles Harrison Mason
Charles Harrison Mason was an influential African American Holiness–Pentecostal minister who became the leading figure of early Pentecostalism in the United States.
-
E.
Nathaniel Bowditch
Nathaniel Bowditch was an American mathematician and astronomer best known for his influential work in celestial navigation and his book "The New American Practical Navigator."
- 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: John Harrison Target entity description: John Harrison was an 18th-century English clockmaker renowned for inventing marine chronometers that solved the problem of determining longitude at sea.
-
A.
James Bradley
James Bradley was an 18th-century English astronomer best known for discovering the aberration of starlight and providing strong evidence for the Earth's motion around the Sun.
-
B.
Sandford Fleming
Sandford Fleming was a Scottish-born Canadian engineer and inventor best known for proposing worldwide standard time zones and contributing significantly to Canada's railway development.
-
C.
John Flamsteed
John Flamsteed was a 17th–18th century English astronomer best known as the first Astronomer Royal and for his foundational star cataloguing work.
-
D.
Charles Harrison Mason
Charles Harrison Mason was an influential African American Holiness–Pentecostal minister who became the leading figure of early Pentecostalism in the United States.
-
E.
Nathaniel Bowditch
Nathaniel Bowditch was an American mathematician and astronomer best known for his influential work in celestial navigation and his book "The New American Practical Navigator."
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
clockmaker
ⓘ
horologist ⓘ human ⓘ inventor ⓘ |
| awardReceived | Longitude prize (partial payments) ⓘ |
| burialPlace | St John’s Church, Hampstead ⓘ |
| countryOfCitizenship |
England
ⓘ
Kingdom of Great Britain ⓘ |
| dateOfBirth | 1693-03-24 ⓘ |
| dateOfDeath | 1776-03-24 ⓘ |
| describedBySource |
Longitude Act history
ⓘ
Royal Observatory Greenwich records ⓘ |
| era | 18th century ⓘ |
| ethnicGroup | English ⓘ |
| familyName | Harrison ⓘ |
| fieldOfWork |
horology
ⓘ
timekeeping ⓘ |
| genreOfWork | precision mechanical instruments ⓘ |
| givenName | John ⓘ |
| hasInfluenced | standardization of timekeeping at sea ⓘ |
| hasPart |
H1
ⓘ
H2 ⓘ H3 ⓘ H4 ⓘ |
| influenced |
development of marine navigation
ⓘ
later chronometer makers ⓘ |
| knownFor |
development of accurate marine timekeepers
ⓘ
solving the problem of determining longitude at sea ⓘ |
| languageOfWorkOrName | English ⓘ |
| name | John Harrison self-link ⓘ |
| notableAchievement | created timekeepers accurate to within a few seconds over long sea voyages ⓘ |
| notableWork |
H1 marine timekeeper
ⓘ
H2 marine timekeeper ⓘ H3 marine timekeeper ⓘ Larcum Kendall K1 chronometer ⓘ
surface form:
H4 marine timekeeper
marine chronometer ⓘ |
| occupation |
clockmaker
ⓘ
inventor ⓘ |
| placeOfBirth |
England
ⓘ
Foulby ⓘ West Yorkshire ⓘ |
| placeOfDeath |
England
ⓘ
London, England ⓘ
surface form:
London
|
| problemSolved | practical determination of longitude at sea ⓘ |
| residence |
Barrow-upon-Humber
ⓘ
surface form:
Barrow upon Humber
London, England ⓘ
surface form:
London
|
| sexOrGender | male ⓘ |
| significantEvent |
submission of H4 to the Board of Longitude
ⓘ
tests of marine chronometers on sea voyages ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: John Harrison Description of subject: John Harrison was an 18th-century English clockmaker renowned for inventing marine chronometers that solved the problem of determining longitude at sea.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
John Harrison (clockmaker)
this entity surface form:
John Harrison H4 marine timekeeper
this entity surface form:
Harrison marine chronometers