| appearance as argument number 1 |
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| No TPTP formula. May not be expressible in strict first order. | Geography.kif 6830-6830 | Environmental water issue is a subclass of environmental issue |
| appearance as argument number 2 |
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|
| No TPTP formula. May not be expressible in strict first order. | Geography.kif 6832-6832 | Inadequate potable water issue is an instance of environmental water issue |
| No TPTP formula. May not be expressible in strict first order. | Geography.kif 6831-6831 | Limited fresh water issue is an instance of environmental water issue |
| No TPTP formula. May not be expressible in strict first order. | Geography.kif 6839-6839 | Water pollution issue is an instance of environmental water issue |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 22276-22276 | |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 22275-22275 | |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 22274-22274 |
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Sigma version 3.0 is open source software produced by Articulate Software and its partners