AM
E400799
AM is a radio broadcasting band used for transmitting audio signals via amplitude modulation, commonly for talk radio and news stations.
All labels observed (1)
| Label | Occurrences |
|---|---|
| AM canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T3926796 — 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: AM Context triple: [WBZ (AM), band, AM]
-
A.
AM
AM is the two-letter IATA airline designator used to identify Aeroméxico in global aviation systems.
-
B.
AM
AM is the two-letter ISO 3166 country code assigned to the Republic of Armenia.
-
C.
AMA
AMA is the leading professional association and lobbying group representing physicians and medical students in the United States.
-
D.
AMB
AMB is the IATA airport code for RAAF Base Amberley, a major Royal Australian Air Force base in Queensland, Australia.
-
E.
AMTK
AMTK is the reporting mark used by Amtrak, the United States’ national passenger railroad service, to identify its locomotives and rolling stock.
- 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: AM Target entity description: AM is a radio broadcasting band used for transmitting audio signals via amplitude modulation, commonly for talk radio and news stations.
-
A.
AM
AM is the two-letter IATA airline designator used to identify Aeroméxico in global aviation systems.
-
B.
AM
AM is the two-letter ISO 3166 country code assigned to the Republic of Armenia.
-
C.
AMA
AMA is the leading professional association and lobbying group representing physicians and medical students in the United States.
-
D.
AMB
AMB is the IATA airport code for RAAF Base Amberley, a major Royal Australian Air Force base in Queensland, Australia.
-
E.
AMTK
AMTK is the reporting mark used by Amtrak, the United States’ national passenger railroad service, to identify its locomotives and rolling stock.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
amplitude modulation system
ⓘ
radio broadcasting band ⓘ |
| advantage |
long-range coverage especially at night
ⓘ
relatively simple receiver design ⓘ |
| allocatedBy | International Telecommunication Union ⓘ |
| audioBandwidthLimit | about 5 kHz to 10 kHz in typical broadcasting ⓘ |
| bandName | medium wave band in many regions ⓘ |
| canInclude | single-sideband variants in some services ⓘ |
| carrierPropertyVaried | amplitude ⓘ |
| commonContentType |
news bulletins
ⓘ
religious programming ⓘ sports commentary ⓘ talk shows ⓘ traffic reports ⓘ |
| comparedTo | FM broadcasting ⓘ |
| demodulatedBy |
envelope detector
ⓘ
synchronous detector ⓘ |
| disadvantage |
lower audio fidelity than FM
ⓘ
narrower audio bandwidth ⓘ susceptibility to electrical noise ⓘ |
| fullName | Amplitude Modulation ⓘ |
| historicalUse |
aviation communication (AM voice) in some bands
ⓘ
early commercial radio broadcasting ⓘ military radio communication ⓘ |
| informationCarriedIn | variations in carrier amplitude ⓘ |
| modulationType | amplitude modulation ⓘ |
| propagationCharacteristic |
ground wave propagation
ⓘ
skywave propagation at night ⓘ |
| receiverType | AM radio receiver ⓘ |
| regulatedIn |
Europe
ⓘ
Japan ⓘ United States ⓘ
linked to:
United States of America
|
| requires |
audio-frequency modulating signal
ⓘ
carrier wave ⓘ |
| signalFormat | double-sideband with carrier ⓘ |
| subjectTo |
channel spacing regulations
ⓘ
licensing by national regulators ⓘ power limits for transmitters ⓘ |
| transmitterType | AM broadcast transmitter ⓘ |
| typicalFrequencyRange |
530 kHz to 1700 kHz
ⓘ
medium frequency band ⓘ |
| usedFor |
emergency broadcasts
ⓘ
long-distance radio communication ⓘ news radio ⓘ radio broadcasting ⓘ sports radio ⓘ talk radio ⓘ transmitting audio signals ⓘ |
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: AM Description of subject: AM is a radio broadcasting band used for transmitting audio signals via amplitude modulation, commonly for talk radio and news stations.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.