| appearance as argument number 1 |
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| No TPTP formula. May not be expressible in strict first order. | Medicine.kif 1965-1971 | |
| No TPTP formula. May not be expressible in strict first order. | Medicine.kif 1964-1964 | Cephalosporin 是 抗生素 的 subclass |
| appearance as argument number 2 |
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| No TPTP formula. May not be expressible in strict first order. | Medicine.kif 1973-1973 | Cefotetan 是 Cephalosporin 的 subclass |
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Sigma version 3.0 is open source software produced by Articulate Software and its partners