John H. Ferguson
E116335
John H. Ferguson was the Louisiana judge whose ruling upholding racial segregation in the Plessy v. Ferguson case led to the U.S. Supreme Court’s landmark “separate but equal” decision.
All labels observed (1)
| Label | Occurrences |
|---|---|
| John H. Ferguson canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T181530 — 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 H. Ferguson Context triple: [Plessy v. Ferguson, defendant, John H. Ferguson]
-
A.
Edmund G. Ross
Edmund G. Ross was a 19th-century U.S. senator from Kansas best known for casting the decisive vote against the impeachment of President Andrew Johnson, an act later celebrated in John F. Kennedy’s "Profiles in Courage."
-
B.
William C. Foster
William C. Foster was an American government official and diplomat best known for his leadership roles in U.S. foreign aid and arms control policy during the mid-20th century.
-
C.
Harry M. Wegeforth
Harry M. Wegeforth was an American physician and civic leader best known for establishing and guiding the early development of the San Diego Zoo into a major zoological institution.
-
D.
Albert D. Wheelon
Albert D. Wheelon was an American physicist and intelligence official known for his pioneering role in developing U.S. satellite reconnaissance programs and later contributions to aerospace and national security policy.
-
E.
Joseph E. Sheffield
Joseph E. Sheffield was a 19th-century American railroad executive and philanthropist whose major donations to Yale University led to the establishment of the Sheffield Scientific School.
- 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 H. Ferguson Target entity description: John H. Ferguson was the Louisiana judge whose ruling upholding racial segregation in the Plessy v. Ferguson case led to the U.S. Supreme Court’s landmark “separate but equal” decision.
-
A.
Edmund G. Ross
Edmund G. Ross was a 19th-century U.S. senator from Kansas best known for casting the decisive vote against the impeachment of President Andrew Johnson, an act later celebrated in John F. Kennedy’s "Profiles in Courage."
-
B.
William C. Foster
William C. Foster was an American government official and diplomat best known for his leadership roles in U.S. foreign aid and arms control policy during the mid-20th century.
-
C.
Harry M. Wegeforth
Harry M. Wegeforth was an American physician and civic leader best known for establishing and guiding the early development of the San Diego Zoo into a major zoological institution.
-
D.
Albert D. Wheelon
Albert D. Wheelon was an American physicist and intelligence official known for his pioneering role in developing U.S. satellite reconnaissance programs and later contributions to aerospace and national security policy.
-
E.
Joseph E. Sheffield
Joseph E. Sheffield was a 19th-century American railroad executive and philanthropist whose major donations to Yale University led to the establishment of the Sheffield Scientific School.
- F. None of above. chosen
Statements (29)
| Predicate | Object |
|---|---|
| instanceOf |
judge
ⓘ
person ⓘ |
| appliedLaw | Louisiana Separate Car Act ⓘ |
| associatedWith |
Jim Crow laws
ⓘ
surface form:
Jim Crow laws in the United States
|
| associatedWithLegalDoctrine | racial segregation in public transportation ⓘ |
| countryOfCitizenship | United States of America ⓘ |
| decisionAffirmedBy |
Plessy v. Ferguson (1896)
ⓘ
surface form:
U.S. Supreme Court in Plessy v. Ferguson
|
| decisionUpheldBy | Louisiana Supreme Court ⓘ |
| ethnicSegregationCase | railroad car segregation ⓘ |
| fieldOfWork |
judiciary
ⓘ
law ⓘ |
| historicalEra | late 19th century United States ⓘ |
| influencedByEvent | enactment of Louisiana Separate Car Act of 1890 ⓘ |
| jurisdiction |
Louisiana
ⓘ
surface form:
State of Louisiana
|
| knownFor | role in Plessy v. Ferguson ⓘ |
| legacy | contributed to establishment of separate but equal doctrine ⓘ |
| legalDecision | upheld Louisiana’s racial segregation law in Plessy v. Ferguson ⓘ |
| legalIssueAddressed | constitutionality of racial segregation in railway cars ⓘ |
| legalSystem | American legal system ⓘ |
| mentionedIn |
Plessy v. Ferguson (1896)
ⓘ
surface form:
U.S. Supreme Court decision Plessy v. Ferguson (1896)
|
| notableCourtCase |
Plessy v. Ferguson (1896)
ⓘ
surface form:
Plessy v. Ferguson
|
| occupation | judge ⓘ |
| opposedParty | Homer Plessy ⓘ |
| partyInLawsuit | defendant in Plessy v. Ferguson ⓘ |
| placeOfActivity |
New Orleans
ⓘ
surface form:
New Orleans, Louisiana
|
| positionHeld | Louisiana judge ⓘ |
| roleInCase | trial court judge in Plessy v. Ferguson ⓘ |
| sideSupportedInCase |
Louisiana
ⓘ
surface form:
State of Louisiana
|
| supportedDoctrine | separate but equal (at trial level) ⓘ |
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 H. Ferguson Description of subject: John H. Ferguson was the Louisiana judge whose ruling upholding racial segregation in the Plessy v. Ferguson case led to the U.S. Supreme Court’s landmark “separate but equal” decision.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Plessy v. Ferguson