A best friend may undergo a disappearance.Logical formLearned from9 sentences. Involvement can be in disappearances.Logical formLearned from9 sentences. An article can be about a disappearance.Logical formLearned from9 sentences. A disappearance of (class property) can be a disappearance of production.Logical formLearned from9 sentences. A subject may undergo a disappearance.Logical formLearned from9 sentences. Classes may undergo a disappearance.Logical formLearned from9 sentences. (Class property) may undergo a disappearance.Logical formLearned from9 sentences. Forms may undergo a disappearance.Logical formLearned from9 sentences. A corpse may undergo a disappearance.Logical formLearned from9 sentences. (Class culture) may undergo a disappearance.Logical formLearned from9 sentences. A fish may undergo a disappearance.Logical formLearned from9 sentences. (Investment banks) may undergo a disappearance.Logical formLearned from9 sentences. Tourists may undergo a disappearance.Logical formLearned from9 sentences. A book may undergo a disappearance.Logical formLearned from9 sentences. Disappearances may pertain-to a person.Logical formLearned from9 sentences.