| appearance as argument number 1 |
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| No TPTP formula. May not be expressible in strict first order. | Sports.kif 357-357 | |
| No TPTP formula. May not be expressible in strict first order. | Sports.kif 356-356 | Car racing driver is an instance of professional athlete |
| appearance as argument number 2 |
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| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 64593-64593 |
| antecedent |
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| No TPTP formula. May not be expressible in strict first order. | Sports.kif 424-426 |
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Sigma version 3.0 is open source software produced by Articulate Software and its partners