| (subclass StringInstrument MusicalInstrument) | Music.kif 1186-1186 | |
| (subclass Violin StringInstrument) | Music.kif 1224-1224 | |
| (subclass Piano StringInstrument) | Music.kif 1228-1228 | |
| (subclass Cello StringInstrument) | Music.kif 1232-1232 | |
| (subclass Guitar StringInstrument) | Music.kif 1235-1235 | |
| (subclass Cithara StringInstrument) | Music.kif 1312-1312 |
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