OPERA
E135686
OPERA was a long-baseline neutrino oscillation experiment at the Gran Sasso National Laboratory in Italy, designed to detect tau neutrinos in a beam sent from CERN.
All labels observed (1)
| Label | Occurrences |
|---|---|
| OPERA canonical | 5 |
How this entity was disambiguated
This entity first appeared as the object of triple T1184047 — 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: OPERA Context triple: [CNGS, usedForExperiment, OPERA]
-
A.
Opera
Opera is a web browser known for its built-in features like a free VPN, ad blocker, and integrated messaging tools.
-
B.
opera "Prima Donna"
"Prima Donna" is a French-language opera by singer-songwriter Rufus Wainwright that explores the life and struggles of an aging opera diva.
-
C.
opera "Eugene Onegin"
"Eugene Onegin" is a lyric opera in three acts by Pyotr Ilyich Tchaikovsky, based on Alexander Pushkin’s novel in verse and renowned as one of the central works of the Russian operatic repertoire.
-
D.
opera "The Queen of Spades"
"The Queen of Spades" is a Russian opera by Pyotr Ilyich Tchaikovsky, based on Alexander Pushkin’s novella about obsession, gambling, and fate.
-
E.
opera "Hadrian"
The opera "Hadrian" is a contemporary work by singer-songwriter and composer Rufus Wainwright that dramatizes the life and love of the Roman Emperor Hadrian, particularly his relationship with Antinous.
- 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: OPERA Target entity description: OPERA was a long-baseline neutrino oscillation experiment at the Gran Sasso National Laboratory in Italy, designed to detect tau neutrinos in a beam sent from CERN.
-
A.
Opera
Opera is a web browser known for its built-in features like a free VPN, ad blocker, and integrated messaging tools.
-
B.
opera "Prima Donna"
"Prima Donna" is a French-language opera by singer-songwriter Rufus Wainwright that explores the life and struggles of an aging opera diva.
-
C.
opera "Eugene Onegin"
"Eugene Onegin" is a lyric opera in three acts by Pyotr Ilyich Tchaikovsky, based on Alexander Pushkin’s novel in verse and renowned as one of the central works of the Russian operatic repertoire.
-
D.
opera "The Queen of Spades"
"The Queen of Spades" is a Russian opera by Pyotr Ilyich Tchaikovsky, based on Alexander Pushkin’s novella about obsession, gambling, and fate.
-
E.
opera "Hadrian"
The opera "Hadrian" is a contemporary work by singer-songwriter and composer Rufus Wainwright that dramatizes the life and love of the Roman Emperor Hadrian, particularly his relationship with Antinous.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
long-baseline experiment
ⓘ
neutrino experiment ⓘ particle physics experiment ⓘ |
| acronymFor | Oscillation Project with Emulsion-tRacking Apparatus ⓘ |
| baselineLength | approximately 730 km ⓘ |
| beamEnergy | tens of GeV scale ⓘ |
| beamSource |
Super Proton Synchrotron at CERN
ⓘ
linked to:
Super Proton Synchrotron
|
| beamType | muon neutrino beam ⓘ |
| collaborationIncludes |
Asian institutions
ⓘ
European institutions ⓘ Middle Eastern institutions ⓘ |
| collaborationType | international collaboration ⓘ |
| countryOfHostLaboratory | Italy ⓘ |
| dataAnalysisPeriodUntil | mid-2010s ⓘ |
| detectorMass | approximately 1.25 kilotons ⓘ |
| distanceFromCERN | approximately 730 km ⓘ |
| distanceFromSource |
CERN SPS complex
ⓘ
linked to:
CERN accelerator complex
|
| endOfDataTaking | 2012 ⓘ |
| evidenceFor | appearance of tau neutrinos in a muon neutrino beam ⓘ |
| fullName | Oscillation Project with Emulsion-tRacking Apparatus ⓘ |
| fundedBy |
CERN
ⓘ
INFN ⓘ
linked to:
Istituto Nazionale di Fisica Nucleare
|
| hostLaboratory |
INFN Gran Sasso National Laboratory
ⓘ
linked to:
Gran Sasso National Laboratory
|
| laboratoryAcronym | LNGS ⓘ |
| locatedIn | Gran Sasso National Laboratory ⓘ |
| locatedInCountry | Italy ⓘ |
| locatedUnderground | true ⓘ |
| partOf |
CERN Neutrinos to Gran Sasso program
ⓘ
linked to:
CNGS (historical neutrino facility)
|
| primaryGoal |
detection of tau neutrinos
ⓘ
observation of νμ→ντ oscillations ⓘ |
| providedEvidenceFor | neutrino flavor oscillation ⓘ |
| receivesBeamFrom | CERN ⓘ |
| reportedFirstTauCandidate | 2010 ⓘ |
| reportedObservationOfNuTauAppearance | 2015 ⓘ |
| researchField |
neutrino oscillations
ⓘ
neutrino physics ⓘ |
| scientificObjective | direct observation of tau lepton production from ντ charged-current interactions ⓘ |
| sitedIn | LNGS underground halls ⓘ |
| startOfDataTaking | 2008 ⓘ |
| status |
completed
ⓘ
decommissioned ⓘ |
| usesBeam |
CERN Neutrinos to Gran Sasso beam
ⓘ
linked to:
CNGS (historical neutrino facility)
|
| usesDetectorType | emulsion cloud chamber ⓘ |
| usesTargetMaterial |
lead
ⓘ
nuclear emulsion films ⓘ |
| usesTechnology |
lead-emulsion target bricks
ⓘ
nuclear emulsion plates ⓘ |
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: OPERA Description of subject: OPERA was a long-baseline neutrino oscillation experiment at the Gran Sasso National Laboratory in Italy, designed to detect tau neutrinos in a beam sent from CERN.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.