Infrastructure may be buried under feet of volcanic ash.Logical formLearned from5 sentences. A shift can be in volcanic activity.Logical formLearned from5 sentences. Footprints may be made in volcanic ash.Logical formLearned from5 sentences. Rivers can be constituted-of-or-filled-with volcanic ash.Logical formLearned from5 sentences. Drifting clouds can be constituted-of-or-filled-with volcanic ash.Logical formLearned from5 sentences. A volcanic ash can be wet.Logical formLearned from5 sentences. An island of some persons may experience a volcanic earthquake.Logical formLearned from5 sentences. Chances can be volcanic.Logical formLearned from5 sentences. A carter can be volcanic.Logical formLearned from5 sentences. Preliminary reports may indicate volcanic activity.Logical formLearned from5 sentences. Volcanic eruptions can be rare.Logical formLearned from5 sentences. Volcanic ash can be in engines.Logical formLearned from5 sentences. Edges may pertain-to a volcanic plume.Logical formLearned from5 sentences. Volcanic ash may close skies.Logical formLearned from5 sentences. Airports can be due to volcanic ash.Logical formLearned from5 sentences.