AO
E133081
AO is the common abbreviation for Agent Orange, a highly toxic herbicide and defoliant used by the U.S. military during the Vietnam War that caused widespread environmental damage and severe health effects.
All labels observed (1)
| Label | Occurrences |
|---|---|
| AO canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T1171061 — 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: AO Context triple: [Agent Orange, abbreviation, AO]
-
A.
AO
AO is the two-letter ISO 3166-1 alpha-2 country code representing Angola in international standards and systems.
-
B.
AO
AO is the commonly used abbreviation for the Administrative Office of the United States Courts, the federal agency that provides administrative support to the U.S. federal judiciary.
-
C.
AO
AO is the vehicle registration code used on license plates for vehicles registered in Italy’s Aosta Valley region.
-
D.
ANA
ANA is the standard three-letter abbreviation used for the Anaheim Ducks, a professional ice hockey team in the National Hockey League.
-
E.
AN
AN is the vehicle registration code used on license plates for the Ansbach district in the Middle Franconia region of Bavaria, Germany.
- 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: AO Target entity description: AO is the common abbreviation for Agent Orange, a highly toxic herbicide and defoliant used by the U.S. military during the Vietnam War that caused widespread environmental damage and severe health effects.
-
A.
AO
AO is the two-letter ISO 3166-1 alpha-2 country code representing Angola in international standards and systems.
-
B.
AO
AO is the commonly used abbreviation for the Administrative Office of the United States Courts, the federal agency that provides administrative support to the U.S. federal judiciary.
-
C.
AO
AO is the vehicle registration code used on license plates for vehicles registered in Italy’s Aosta Valley region.
-
D.
ANA
ANA is the standard three-letter abbreviation used for the Anaheim Ducks, a professional ice hockey team in the National Hockey League.
-
E.
AN
AN is the vehicle registration code used on license plates for the Ansbach district in the Middle Franconia region of Bavaria, Germany.
- F. None of above. chosen
Statements (51)
| Predicate | Object |
|---|---|
| instanceOf |
chemical weapon
ⓘ
defoliant ⓘ herbicide ⓘ |
| abbreviation | AO self-linksurface differs ⓘ |
| associatedWith |
U.S. veterans health problems
ⓘ
Vietnamese civilian health problems ⓘ |
| causes |
birth defects
ⓘ
cancer ⓘ cardiovascular diseases ⓘ chloracne ⓘ deforestation ⓘ developmental disabilities ⓘ endocrine disruption ⓘ environmental contamination ⓘ food chain contamination ⓘ immune system disorders ⓘ liver damage ⓘ loss of biodiversity ⓘ miscarriages ⓘ neurological disorders ⓘ reproductive problems ⓘ respiratory diseases ⓘ skin disorders ⓘ soil contamination ⓘ stillbirths ⓘ water contamination ⓘ |
| contaminatedWith |
TCDD
ⓘ
dioxin ⓘ |
| hasComponent |
2,4,5-trichlorophenoxyacetic acid
ⓘ
2,4-dichlorophenoxyacetic acid ⓘ |
| isToxic | true ⓘ |
| producedBy |
Dow Chemical Company
ⓘ
Monsanto Company ⓘ other U.S. chemical companies ⓘ |
| recognizedAsCauseOf | presumptive diseases in U.S. veterans ⓘ |
| refersTo | Agent Orange ⓘ |
| regulatedBy |
United States Department of Veterans Affairs
ⓘ
surface form:
U.S. Department of Veterans Affairs
|
| subjectOf |
international controversy
ⓘ
war crime allegations ⓘ |
| timePeriodOfUse |
1960s
ⓘ
early 1970s ⓘ |
| usedAs | defoliant in Vietnam War ⓘ |
| usedBy |
United States Armed Forces
ⓘ
surface form:
United States military
|
| usedFor |
defoliation of forests
ⓘ
destruction of crops ⓘ exposing enemy positions ⓘ removal of forest cover ⓘ |
| usedInConflict | Vietnam War ⓘ |
| usedInCountry |
Cambodia
ⓘ
Laos ⓘ Viet Nam ⓘ
surface form:
Vietnam
|
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: AO Description of subject: AO is the common abbreviation for Agent Orange, a highly toxic herbicide and defoliant used by the U.S. military during the Vietnam War that caused widespread environmental damage and severe health effects.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Agent Orange