A spitting can be volcanic.Logical formLearned from7 sentences. A volcanic activity may continue for years.Logical formLearned from7 sentences. A reduction can be in volcanic activity.Logical formLearned from7 sentences. Gas may be released from volcanic lake.Logical formLearned from7 sentences. Floods can be constituted-of-or-filled-with volcanic ash.Logical formLearned from7 sentences. Volcanic ash may cause damage to (jet engines).Logical formLearned from7 sentences. Volcanic ash can be over a continent.Logical formLearned from7 sentences. (Ash eruptions) can be volcanic.Logical formLearned from7 sentences. A volcanic eruption may occur.Logical formLearned from7 sentences. (Ash grounding flights) can be volcanic.Logical formLearned from7 sentences. An impact may pertain-to a volcanic ash.Logical formLearned from7 sentences. A result can be constituted-of-or-filled-with volcanic ash.Logical formLearned from7 sentences. A quake may cause volcanic eruptions.Logical formLearned from7 sentences. Mounds can be volcanic.Logical formLearned from7 sentences. Volcanic eruptions can be regular.Logical formLearned from7 sentences.