| appearance as argument number 1 |
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| No TPTP formula. May not be expressible in strict first order. | Mid-level-ontology.kif 25435-25436 | |
| No TPTP formula. May not be expressible in strict first order. | Mid-level-ontology.kif 25434-25434 | Sprinkler is a subclass of device |
| appearance as argument number 2 |
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| No TPTP formula. May not be expressible in strict first order. | Mid-level-ontology.kif 25439-25439 | Water sprinkler is a subclass of sprinkler |
| No TPTP formula. May not be expressible in strict first order. | Mid-level-ontology.kif 25437-25437 |
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Sigma version 3.0 is open source software produced by Articulate Software and its partners