A line can be volcanic.Logical formLearned from6 sentences. A catastrophe can be volcanic.Logical formLearned from6 sentences. Concerns can be about volcanic ash.Logical formLearned from6 sentences. An (ash presence) can be volcanic.Logical formLearned from6 sentences. A lull can be in volcanic activity.Logical formLearned from6 sentences. A volcanic ash may head.Logical formLearned from6 sentences. Cases can be constituted-of-or-filled-with volcanic eruptions.Logical formLearned from6 sentences. Airspace can be free of volcanic ash.Logical formLearned from6 sentences. Shifting winds may send a plume of volcanic ash.Logical formLearned from6 sentences. A (test flight) may find levels of volcanic ash.Logical formLearned from6 sentences. Volcanic ash may undergo an ejection.Logical formLearned from6 sentences. An ejection of volcanic ash may continue for days.Logical formLearned from6 sentences. A volcanic island can be a desert.Logical formLearned from6 sentences. A cloud of (carbon dioxide) may escape from a volcanic lake.Logical formLearned from6 sentences. A membership may pertain-to a volcanic island.Logical formLearned from6 sentences.