McDonnell Douglas DC-9
E230372
The McDonnell Douglas DC-9 is a twin-engine, short- to medium-range jet airliner introduced in the 1960s that became widely used by airlines around the world and served as the basis for later MD-80/90 series aircraft.
All labels observed (9)
| Label | Occurrences |
|---|---|
| McDonnell Douglas DC-9 canonical | 10 |
| Douglas DC-9 | 3 |
| DC-9 family | 2 |
| DC-9 | 1 |
| DC-9/MD-80/MD-90 family | 1 |
| DC9 | 1 |
| Douglas DC-9-15 | 1 |
| McDonnell Douglas DC-9 design | 1 |
| McDonnell Douglas DC-9 family | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1815387 — 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: McDonnell Douglas DC-9 Context triple: [McDonnell Douglas, notableProduct, McDonnell Douglas DC-9]
-
A.
McDonnell Douglas DC-10
The McDonnell Douglas DC-10 is a wide-body, three-engine commercial airliner introduced in the early 1970s and used extensively for medium- to long-haul passenger and cargo flights worldwide.
-
B.
Boeing 727
The Boeing 727 is a mid-sized, three-engine narrow-body jet airliner introduced in the 1960s that became one of the most widely used commercial aircraft for short- and medium-haul routes.
-
C.
Boeing 717-200
The Boeing 717-200 is a short- to medium-range, twin-engine narrow-body jet airliner designed primarily for high-frequency regional routes.
-
D.
Boeing 757
The Boeing 757 is a mid-size, narrow-body twin-engine jet airliner widely used for short- to medium- and some long-haul routes, known for its strong performance and versatility.
-
E.
Lockheed L-1011 TriStar
The Lockheed L-1011 TriStar is a wide-body commercial airliner developed in the late 1960s and 1970s, known for its advanced technology, three-engine configuration, and role as a major competitor to the McDonnell Douglas DC-10.
- 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: McDonnell Douglas DC-9 Target entity description: The McDonnell Douglas DC-9 is a twin-engine, short- to medium-range jet airliner introduced in the 1960s that became widely used by airlines around the world and served as the basis for later MD-80/90 series aircraft.
-
A.
McDonnell Douglas DC-10
The McDonnell Douglas DC-10 is a wide-body, three-engine commercial airliner introduced in the early 1970s and used extensively for medium- to long-haul passenger and cargo flights worldwide.
-
B.
Boeing 727
The Boeing 727 is a mid-sized, three-engine narrow-body jet airliner introduced in the 1960s that became one of the most widely used commercial aircraft for short- and medium-haul routes.
-
C.
Boeing 717-200
The Boeing 717-200 is a short- to medium-range, twin-engine narrow-body jet airliner designed primarily for high-frequency regional routes.
-
D.
Boeing 757
The Boeing 757 is a mid-size, narrow-body twin-engine jet airliner widely used for short- to medium- and some long-haul routes, known for its strong performance and versatility.
-
E.
Lockheed L-1011 TriStar
The Lockheed L-1011 TriStar is a wide-body commercial airliner developed in the late 1960s and 1970s, known for its advanced technology, three-engine configuration, and role as a major competitor to the McDonnell Douglas DC-10.
- F. None of above. chosen
Statements (49)
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: McDonnell Douglas DC-9 Description of subject: The McDonnell Douglas DC-9 is a twin-engine, short- to medium-range jet airliner introduced in the 1960s that became widely used by airlines around the world and served as the basis for later MD-80/90 series aircraft.
Referenced by (21)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Douglas DC-9-15
this entity surface form:
Douglas DC-9
this entity surface form:
Douglas DC-9
this entity surface form:
McDonnell Douglas DC-9 family
this entity surface form:
McDonnell Douglas DC-9 design
this entity surface form:
Douglas DC-9
this entity surface form:
DC-9 family
this entity surface form:
DC9
this entity surface form:
DC-9 family
this entity surface form:
DC-9
this entity surface form:
DC-9/MD-80/MD-90 family