D-18
E892686
The D-18 is a renowned Martin dreadnought acoustic guitar model, celebrated for its mahogany back and sides, spruce top, and clear, balanced tone favored by many folk and bluegrass musicians.
All labels observed (1)
| Label | Occurrences |
|---|---|
| D-18 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10911011 — 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: D-18 Context triple: [C. F. Martin & Company, notableSeries, D-18]
-
A.
D-1
D-1 was a pioneering early Spacelab mission that helped demonstrate and validate the European-built laboratory’s capabilities for conducting scientific research in space aboard the Space Shuttle.
-
B.
D68
D68 is the pennant number assigned to HMAS Vampire, a Royal Australian Navy destroyer.
-
C.
D8
D8 is the commonly used abbreviation for California Department of Transportation's District 8, which oversees state highways and transportation infrastructure in parts of Southern California.
-
D.
D-358
D-358 was the pennant number assigned in Turkish naval service to the former USS Buchanan, a U.S. Navy destroyer transferred to Turkey.
-
E.
D-2000
D-2000 was the civil registration of the pioneering German Junkers G 38, one of the largest and most distinctive all-metal airliners of the late 1920s and early 1930s.
- 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: D-18 Target entity description: The D-18 is a renowned Martin dreadnought acoustic guitar model, celebrated for its mahogany back and sides, spruce top, and clear, balanced tone favored by many folk and bluegrass musicians.
-
A.
D-1
D-1 was a pioneering early Spacelab mission that helped demonstrate and validate the European-built laboratory’s capabilities for conducting scientific research in space aboard the Space Shuttle.
-
B.
D68
D68 is the pennant number assigned to HMAS Vampire, a Royal Australian Navy destroyer.
-
C.
D8
D8 is the commonly used abbreviation for California Department of Transportation's District 8, which oversees state highways and transportation infrastructure in parts of Southern California.
-
D.
D-358
D-358 was the pennant number assigned in Turkish naval service to the former USS Buchanan, a U.S. Navy destroyer transferred to Turkey.
-
E.
D-2000
D-2000 was the civil registration of the pioneering German Junkers G 38, one of the largest and most distinctive all-metal airliners of the late 1920s and early 1930s.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
Martin guitar model
ⓘ
acoustic guitar model ⓘ |
| backAndSidesMaterial | mahogany ⓘ |
| bodyBackMaterial | mahogany ⓘ |
| bodyShape | dreadnought ⓘ |
| bodySideMaterial | mahogany ⓘ |
| bodyStyle | 14-fret dreadnought ⓘ |
| bracing | X-bracing ⓘ |
| bridgeMaterial | ebony ⓘ |
| construction | all-solid wood ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| family | Martin D-series NERFINISHED ⓘ |
| fingerboardMaterial | ebony ⓘ |
| guitarType | dreadnought ⓘ |
| introducedBy | C. F. Martin & Co. NERFINISHED ⓘ |
| introducedInDecade | 1930s ⓘ |
| isRenownedFor |
classic Martin dreadnought sound
ⓘ
versatility in folk and bluegrass music ⓘ |
| manufacturer | C. F. Martin & Co. NERFINISHED ⓘ |
| marketSegment | high-end acoustic guitar market ⓘ |
| neckJoint | dovetail neck joint ⓘ |
| neckMaterial | mahogany ⓘ |
| notableFeature |
clear, balanced projection suitable for ensemble playing
ⓘ
mahogany back and sides with spruce top ⓘ |
| numberOfFretsClearOfBody | 14 GENERATED ⓘ |
| numberOfStrings | 6 ⓘ |
| nutMaterial | bone ⓘ |
| positionInLine | mahogany-bodied counterpart to D-28 ⓘ |
| primaryFactoryLocation | Nazareth, Pennsylvania GENERATED ⓘ |
| saddleMaterial | bone ⓘ |
| scaleLength | 25.4 inches ⓘ |
| soundDescription |
balanced tone
ⓘ
clear tone ⓘ strong midrange ⓘ |
| stringType | steel strings ⓘ |
| targetPlayerLevel |
advanced amateur
ⓘ
professional ⓘ |
| topBracing | scalloped X-bracing ⓘ |
| topColor | natural ⓘ |
| topConstruction | solid spruce ⓘ |
| topMaterial |
Sitka spruce
NERFINISHED
ⓘ
spruce ⓘ |
| typicalPlayingStyle |
flatpicking
ⓘ
strumming ⓘ |
| typicalUseGenre |
bluegrass
GENERATED
ⓘ
country GENERATED ⓘ folk GENERATED ⓘ |
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: D-18 Description of subject: The D-18 is a renowned Martin dreadnought acoustic guitar model, celebrated for its mahogany back and sides, spruce top, and clear, balanced tone favored by many folk and bluegrass musicians.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.