| appearance as argument number 1 |
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| No TPTP formula. May not be expressible in strict first order. | Economy.kif 3822-3823 | |
| No TPTP formula. May not be expressible in strict first order. | Economy.kif 3821-3821 | Maize grass is a subclass of cereal grass plant |
| appearance as argument number 2 |
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| No TPTP formula. May not be expressible in strict first order. | Economy.kif 4119-4119 | Every maize grain is initially part of a maize grass |
| No TPTP formula. May not be expressible in strict first order. | Economy.kif 3824-3824 |
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