CAA
E31150
CAA is the commonly used abbreviation for the U.S. Clean Air Act, a landmark federal law regulating air emissions to protect public health and the environment.
All labels observed (1)
| Label | Occurrences |
|---|---|
| CAA canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T240913 — 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: CAA Context triple: [Clean Air Act, shortName, CAA]
-
A.
ACA
ACA is a professional scientific organization that promotes the study and application of crystallography and structural science, primarily in North America.
-
B.
CAC
The Central American Cup (CAC) is a regional football tournament featuring national teams from Central America competing for the championship title.
-
C.
CCC
The CCC, or Civilian Conservation Corps, was a New Deal work relief program in the United States during the 1930s and early 1940s that employed young men in conservation and public works projects such as reforestation, park development, and soil erosion control.
-
D.
NAFC
NAFC (North American Football Confederation) was the former governing body for association football in North America prior to its merger into CONCACAF.
-
E.
ACE
ACE (Altamont Corridor Express) is a commuter rail service in California’s San Joaquin Valley and East Bay that provides weekday trains between Stockton and San Jose.
- 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: CAA Target entity description: CAA is the commonly used abbreviation for the U.S. Clean Air Act, a landmark federal law regulating air emissions to protect public health and the environment.
-
A.
ACA
ACA is a professional scientific organization that promotes the study and application of crystallography and structural science, primarily in North America.
-
B.
CAC
The Central American Cup (CAC) is a regional football tournament featuring national teams from Central America competing for the championship title.
-
C.
CCC
The CCC, or Civilian Conservation Corps, was a New Deal work relief program in the United States during the 1930s and early 1940s that employed young men in conservation and public works projects such as reforestation, park development, and soil erosion control.
-
D.
NAFC
NAFC (North American Football Confederation) was the former governing body for association football in North America prior to its merger into CONCACAF.
-
E.
ACE
ACE (Altamont Corridor Express) is a commuter rail service in California’s San Joaquin Valley and East Bay that provides weekday trains between Stockton and San Jose.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf | United States federal law ⓘ |
| abbreviation | CAA self-linksurface differs ⓘ |
| acronymOf | CAA self-linksurface differs ⓘ |
| administeredBy | United States Environmental Protection Agency ⓘ |
| authorizes |
Acid Rain Program
ⓘ
NESHAP ⓘ
surface form:
National Emission Standards for Hazardous Air Pollutants
New Source Performance Standards ⓘ Prevention of Significant Deterioration program ⓘ Title V operating permit program ⓘ stratospheric ozone protection program ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| enactedBy | United States Congress ⓘ |
| enforcementMechanism |
citizen suits
ⓘ
civil penalties ⓘ criminal penalties ⓘ |
| establishes |
New Source Review
ⓘ
surface form:
New Source Review program
criteria pollutants framework ⓘ nonattainment area classifications ⓘ |
| expandsTo | Clean Air Act ⓘ |
| focusesOn |
acid rain
ⓘ
ambient air quality ⓘ hazardous air pollutants ⓘ regional haze ⓘ stratospheric ozone protection ⓘ |
| jurisdiction | federal ⓘ |
| legalCitation | 42 U.S.C. §7401 et seq. ⓘ |
| majorAmendmentYear |
1970
ⓘ
1977 ⓘ 1990 ⓘ |
| originalEnactmentYear | 1963 ⓘ |
| policyType | environmental regulation ⓘ |
| primaryGoal | protection of public health ⓘ |
| regulates |
air emissions
ⓘ
mobile sources of air pollution ⓘ stationary sources of air pollution ⓘ |
| requires |
National Ambient Air Quality Standards
ⓘ
State Implementation Plans ⓘ |
| secondaryGoal | protection of the environment ⓘ |
| section |
Title I – Air Pollution Prevention and Control
ⓘ
Title II – Emission Standards for Moving Sources ⓘ Title III – General Provisions ⓘ Acid Rain Program ⓘ
surface form:
Title IV – Acid Deposition Control
Title V – Permits ⓘ Title VI – Stratospheric Ozone Protection ⓘ |
| signedBy |
Richard Nixon
ⓘ
surface form:
President Richard Nixon
|
| subjectOf |
air quality standards
ⓘ
greenhouse gas regulation debates ⓘ |
| title | Clean Air Act ⓘ |
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: CAA Description of subject: CAA is the commonly used abbreviation for the U.S. Clean Air Act, a landmark federal law regulating air emissions to protect public health and the environment.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Clean Air Act