(externalImage Missile "http://upload.wikimedia.org/wikipedia/en/thumb/8/ 88/ Spartan_(missile).jpg/ 300px-Spartan_(missile).jpg")	pictureList-ImageNet.kif 448-448
(subclass Missile Projectile)	Mid-level-ontology.kif 17722-17722	子類 導彈 and 拋射物
(subclass Missile SelfPoweredDevice)	Mid-level-ontology.kif 17723-17723	子類 導彈 and 自供電設備

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Sigma version 3.0 is open source software produced by Articulate Software and its partners