C09
E328892
C09 is the station code used by the Washington Metro to identify Pentagon City station on its rail network.
All labels observed (1)
| Label | Occurrences |
|---|---|
| C09 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3135731 — 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: C09 Context triple: [Pentagon City station, hasCode, C09]
-
A.
C90
C90 is the informal name for the 1990 standardization of the C programming language defined by ISO/IEC 9899.
-
B.
C-9
C-9 is a mountain railway line of Madrid’s Cercanías commuter rail network that connects the city with the Sierra de Guadarrama, including the Puerto de Navacerrada and Cotos areas.
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C.
C595
C595 is the designation for an ASTM standard specification covering blended hydraulic cements used in construction.
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D.
C-8
C-8 is a commuter rail line within the Cercanías Madrid network that connects central Madrid with various suburban areas.
-
E.
C-2
C-2 is a commuter rail line within the Cercanías Madrid network that connects central Madrid with its surrounding metropolitan areas.
- 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: C09 Target entity description: C09 is the station code used by the Washington Metro to identify Pentagon City station on its rail network.
-
A.
C90
C90 is the informal name for the 1990 standardization of the C programming language defined by ISO/IEC 9899.
-
B.
C-9
C-9 is a mountain railway line of Madrid’s Cercanías commuter rail network that connects the city with the Sierra de Guadarrama, including the Puerto de Navacerrada and Cotos areas.
-
C.
C595
C595 is the designation for an ASTM standard specification covering blended hydraulic cements used in construction.
-
D.
C-8
C-8 is a commuter rail line within the Cercanías Madrid network that connects central Madrid with various suburban areas.
-
E.
C-2
C-2 is a commuter rail line within the Cercanías Madrid network that connects central Madrid with its surrounding metropolitan areas.
- F. None of above. chosen
Statements (25)
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: C09 Description of subject: C09 is the station code used by the Washington Metro to identify Pentagon City station on its rail network.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.