A town may be buried under volcanic ash.Logical formLearned from2 sentences. A volcanic activity can be isolated.Logical formLearned from2 sentences. A volcanic activity can be fresh.Logical formLearned from2 sentences. Volcanic ash may hit areas.Logical formLearned from2 sentences. Villages may be covered by a volcanic ash.Logical formLearned from2 sentences. A volcanic ash may be scattered.Logical formLearned from2 sentences. Gases may be emitted from a volcanic crater.Logical formLearned from2 sentences. A volcanic eruption may approach.Logical formLearned from2 sentences. Persons may be affected by a volcanic eruption.Logical formLearned from2 sentences. (Steam clouds) can be volcanic.Logical formLearned from2 sentences. A volcanic activity can be persistent.Logical formLearned from2 sentences. A male can be a prisoner of volcanic ash.Logical formLearned from2 sentences. A prisoner can be constituted-of-or-filled-with volcanic ash.Logical formLearned from2 sentences. An article can be about a difficulty of predicting volcanic activity.Logical formLearned from2 sentences. (Flight disruptions) may be caused by volcanic ash.Logical formLearned from2 sentences.