K1
E785578
K1 is the first highly accurate marine chronometer built by Larcum Kendall in the 18th century, famous for its role in improving longitude determination at sea.
All labels observed (1)
| Label | Occurrences |
|---|---|
| K1 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9215388 — 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: K1 Context triple: [Larcum Kendall K1 chronometer, chronometerNumber, K1]
-
A.
K1
K1, also known as Masherbrum, is a prominent 7,821-meter peak in the Karakoram range of Pakistan and one of the world’s highest mountains.
-
B.
K-10
K-10 is a state highway in Kansas that serves as a major east–west commuter and connector route in the Kansas City metropolitan area.
-
C.
K.
K. is the enigmatic land surveyor protagonist of Franz Kafka’s novel "The Castle," whose futile attempts to gain access to the mysterious authorities embody themes of alienation and bureaucratic absurdity.
-
D.
The K
The K is the popular nickname for Kauffman Stadium, the longtime home ballpark of Major League Baseball’s Kansas City Royals.
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E.
K-15
K-15 is a state highway in Kansas that runs north–south, connecting several rural communities and regional routes across the state.
- 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: K1 Target entity description: K1 is the first highly accurate marine chronometer built by Larcum Kendall in the 18th century, famous for its role in improving longitude determination at sea.
-
A.
K1
K1, also known as Masherbrum, is a prominent 7,821-meter peak in the Karakoram range of Pakistan and one of the world’s highest mountains.
-
B.
K-10
K-10 is a state highway in Kansas that serves as a major east–west commuter and connector route in the Kansas City metropolitan area.
-
C.
K.
K. is the enigmatic land surveyor protagonist of Franz Kafka’s novel "The Castle," whose futile attempts to gain access to the mysterious authorities embody themes of alienation and bureaucratic absurdity.
-
D.
The K
The K is the popular nickname for Kauffman Stadium, the longtime home ballpark of Major League Baseball’s Kansas City Royals.
-
E.
K-15
K-15 is a state highway in Kansas that runs north–south, connecting several rural communities and regional routes across the state.
- F. None of above. chosen
Statements (29)
| Predicate | Object |
|---|---|
| instanceOf | marine chronometer ⓘ |
| accuracy | within a few seconds per day under marine conditions ⓘ |
| basedOn |
John Harrison's H4 marine timekeeper
ⓘ
linked to:
Larcum Kendall K1 chronometer
|
| category | 18th-century scientific instrument ⓘ |
| chronology | first of Larcum Kendall's K-series chronometers ⓘ |
| commissionedBy |
British Board of Longitude
ⓘ
linked to:
Board of Longitude
|
| countryOfOrigin | Kingdom of Great Britain ⓘ |
| designedToReplicate |
Harrison H4
ⓘ
linked to:
Zenith
|
| displayType | analog dial ⓘ |
| era | Age of Sail ⓘ |
| escapementType | detent escapement ⓘ |
| field |
horology
ⓘ
navigation ⓘ |
| followedBy |
K2
ⓘ
K3 ⓘ |
| historicalSignificance | helped demonstrate practicality of chronometer method for longitude ⓘ |
| inception | 18th century ⓘ |
| manufacturer | Larcum Kendall ⓘ |
| material | brass ⓘ |
| movementType | spring-driven ⓘ |
| notableFor |
high accuracy in marine navigation
ⓘ
role in solving the longitude problem ⓘ |
| powerReserve | approximately 30 hours ⓘ |
| purpose | to provide a stable time reference for celestial navigation ⓘ |
| regulatorType | balance wheel ⓘ |
| technologyType | mechanical clockwork ⓘ |
| use | determination of longitude at sea ⓘ |
| usedBy | Royal Navy ⓘ |
| usedIn | long-distance 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: K1 Description of subject: K1 is the first highly accurate marine chronometer built by Larcum Kendall in the 18th century, famous for its role in improving longitude determination at sea.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.