Clouds of smoke may rise from an area.Logical formLearned from11 sentences. Impact can be into a cloud of (pepper dust).Logical formLearned from11 sentences. A cloud can be constituted-of-or-filled-with (pepper dust).Logical formLearned from11 sentences. Clouds can be over an economy.Logical formLearned from11 sentences. (Cloud cover) can be over targets.Logical formLearned from11 sentences. Clouds can be constituted-of-or-filled-with (cigar smoke).Logical formLearned from11 sentences. A cloud can be over a country.Logical formLearned from11 sentences. The sun may burn through clouds.Logical formLearned from11 sentences. A cloud can be blue-black.Logical formLearned from11 sentences. A cloud can be constituted-of-or-filled-with concern.Logical formLearned from11 sentences. A cloud of ash may start.Logical formLearned from11 sentences. A cloud can be over a continent.Logical formLearned from11 sentences. An (ash cloud) may disrupt (air travel).Logical formLearned from11 sentences. An (ash cloud) may ground flights.Logical formLearned from11 sentences. A cloud may be spotcheck.Logical formLearned from11 sentences.