. "E22 Man-Made Object"@en . . . "E22"^^ . "Scope note:\nThis class comprises physical objects purposely created by human activity.\n\nNo assumptions are made as to the extent of modification required to justify regarding an object as man-made. For example, an inscribed piece of rock or a preserved butterfly are both regarded as instances of E22 Man-Made Object.\n\nExamples:\n- Mallard (the World's fastest steam engine)\n- the Portland Vase\n- the Coliseum\n\nIn First Order Logic:\nE22(x) \u2283 E19(x)\nE22(x) \u2283 E24(x)"@en .