| P50 | author | ... | Q159592 (John Napier) | John Napier |
| P31 | instance of | ... | Q1666865 (mathematical instrument) | mathematical instrument |
| P279 | subclass of | ... | Q211586 (mechanical calculator) | mechanical calculator |
| P646 | Freebase ID | /m/04h96q |
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log id: 9048335