A cloud may cast a shadow.Logical formLearned from5 sentences. (Morning cloud cover) may delay an operation.Logical formLearned from5 sentences. Sarajevoes may be followed by a cloud of smoke.Logical formLearned from5 sentences. Skies can be with some clouds.Logical formLearned from5 sentences. Drifting clouds can be constituted-of-or-filled-with volcanic ash.Logical formLearned from5 sentences. An (ash cloud) can be dangerous.Logical formLearned from5 sentences. Clouds may skitter.Logical formLearned from5 sentences. A view may show a cloud.Logical formLearned from5 sentences. A crater can be behind clouds.Logical formLearned from5 sentences. Gas may seep through wisps of cloud.Logical formLearned from5 sentences. Dark clouds may be accompanied by rumbles.Logical formLearned from5 sentences. Placards may show (mushroom a-bomb clouds).Logical formLearned from5 sentences. Someone may drop a cloud.Logical formLearned from5 sentences. A cloud can be on a country.Logical formLearned from5 sentences. A blast may cause a cloud of dust.Logical formLearned from5 sentences.