Opus 27 No. 2
E280004
Opus 27 No. 2 is the catalog designation for Beethoven’s famous Piano Sonata No. 14 in C-sharp minor, widely known as the "Moonlight" Sonata.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Opus 27 | 2 |
| Opus 27 No. 2 canonical | 2 |
| Beethoven Opus 27 set | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2577207 — 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: Opus 27 No. 2 Context triple: [Piano Sonata No. 14 in C-sharp minor, Op. 27 No. 2 "Moonlight", catalogNumber, Opus 27 No. 2]
-
A.
Symphony No. 2 in D major, Op. 73
Symphony No. 2 in D major, Op. 73 is a warmly lyrical and pastoral orchestral work by Johannes Brahms, often regarded as one of his most accessible and beloved symphonies.
-
B.
Symphony No. 2 in C minor, Op. 17
Symphony No. 2 in C minor, Op. 17 is a large-scale orchestral work by Pyotr Ilyich Tchaikovsky, often nicknamed the "Little Russian" for its prominent use of Ukrainian folk melodies.
-
C.
Symphony No. 2 in C major, Op. 61
Symphony No. 2 in C major, Op. 61 is a large-scale Romantic symphony by Robert Schumann, admired for its contrapuntal writing, emotional depth, and triumphant finale.
-
D.
Opus 300
Opus 300 is a musical composition, likely part of a numbered series of works by the same composer as Opus 100.
-
E.
Opus 200
Opus 200 is a non-fiction collection by Isaac Asimov that surveys and reflects on his extensive body of work up to his 200th published book.
- 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: Opus 27 No. 2 Target entity description: Opus 27 No. 2 is the catalog designation for Beethoven’s famous Piano Sonata No. 14 in C-sharp minor, widely known as the "Moonlight" Sonata.
-
A.
Symphony No. 2 in D major, Op. 73
Symphony No. 2 in D major, Op. 73 is a warmly lyrical and pastoral orchestral work by Johannes Brahms, often regarded as one of his most accessible and beloved symphonies.
-
B.
Symphony No. 2 in C minor, Op. 17
Symphony No. 2 in C minor, Op. 17 is a large-scale orchestral work by Pyotr Ilyich Tchaikovsky, often nicknamed the "Little Russian" for its prominent use of Ukrainian folk melodies.
-
C.
Symphony No. 2 in C major, Op. 61
Symphony No. 2 in C major, Op. 61 is a large-scale Romantic symphony by Robert Schumann, admired for its contrapuntal writing, emotional depth, and triumphant finale.
-
D.
Opus 300
Opus 300 is a musical composition, likely part of a numbered series of works by the same composer as Opus 100.
-
E.
Opus 200
Opus 200 is a non-fiction collection by Isaac Asimov that surveys and reflects on his extensive body of work up to his 200th published book.
- F. None of above. chosen
Statements (51)
| Predicate | Object |
|---|---|
| instanceOf |
musical work
ⓘ
piano sonata ⓘ |
| alsoKnownAs | Moonlight Sonata ⓘ |
| catalogDesignation | Op. 27 No. 2 ⓘ |
| catalogInBeethovenWerkverzeichnis | Biamonti 247 ⓘ |
| cityOfFirstPublication | Vienna ⓘ |
| composer | Ludwig van Beethoven ⓘ |
| compositionPeriod | Classical period ⓘ |
| countryOfFirstPublication | Austria ⓘ |
| dedicatedTo | Countess Giulietta Guicciardi ⓘ |
| difficultyLevel | advanced piano repertoire ⓘ |
| firstMovementKey | C-sharp minor ⓘ |
| formOfFirstMovement | modified sonata form ⓘ |
| formOfSecondMovement | scherzo and trio ⓘ |
| formOfThirdMovement | sonata-allegro form ⓘ |
| genre | sonata ⓘ |
| historicalSignificance | one of Beethoven’s most famous and frequently performed piano works ⓘ |
| influenced | later Romantic piano writing ⓘ |
| instrumentation | solo piano ⓘ |
| key | C-sharp minor ⓘ |
| languageOfTitle | Italian ⓘ |
| movement |
Adagio sostenuto
ⓘ
Allegretto ⓘ Presto agitato ⓘ |
| nickname | Moonlight ⓘ |
| nicknameOrigin | Inspired by critic Ludwig Rellstab’s comparison to moonlight on Lake Lucerne ⓘ |
| notableFeature |
first movement marked to be played without dampers for much of the piece
ⓘ
unconventional structure with slow movement first and fast movement last ⓘ |
| numberOfMovements | 3 ⓘ |
| numberWithinOpus | 2 ⓘ |
| opusNumber | 27 ⓘ |
| originalTitle | Sonata quasi una fantasia ⓘ |
| pairedWith | Opus 27 No. 1 ⓘ |
| performanceDuration | approximately 15 minutes ⓘ |
| placeInComposerOutput | middle period of Beethoven ⓘ |
| popularMovement | first movement Adagio sostenuto ⓘ |
| publisher | Cappi (Vienna) ⓘ |
| secondMovementKey | D-flat major ⓘ |
| style | early Romantic ⓘ |
| tempoMarkingFirstMovement | Adagio sostenuto ⓘ |
| tempoMarkingSecondMovement | Allegretto ⓘ |
| tempoMarkingThirdMovement | Presto agitato ⓘ |
| thirdMovementKey | C-sharp minor ⓘ |
| timeSignatureFirstMovement | 4/4 ⓘ |
| timeSignatureSecondMovement | 3/4 ⓘ |
| timeSignatureThirdMovement | 4/4 ⓘ |
| title | Piano Sonata No. 14 in C-sharp minor, Op. 27 No. 2 ⓘ |
| workGroup |
Opus 27
ⓘ
linked to:
Opus 27 No. 2
|
| workNumber | Piano Sonata No. 14 ⓘ |
| yearComposed | 1801 ⓘ |
| yearPublished | 1802 ⓘ |
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: Opus 27 No. 2 Description of subject: Opus 27 No. 2 is the catalog designation for Beethoven’s famous Piano Sonata No. 14 in C-sharp minor, widely known as the "Moonlight" Sonata.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Opus 27 No. 2
linked to: Opus 27 No. 2