Clouds can be constituted-of-or-filled-with pollution.Logical formLearned from21 sentences. Clouds can be intermittent.Logical formLearned from21 sentences. Clouds may undergo a treatment.Logical formLearned from21 sentences. Clouds can be visible.Logical formLearned from21 sentences. A molecular cloud can be dense.Logical formLearned from21 sentences. Clouds can be constituted-of-or-filled-with interstellar dust.Logical formLearned from21 sentences. A (gas cloud) can be poisonous.Logical formLearned from21 sentences. A cloud can be constituted-of-or-filled-with depression.Logical formLearned from21 sentences. A cloud of dust may billow into air.Logical formLearned from21 sentences. Some cloud can be constituted-of-or-filled-with smoke.Logical formLearned from21 sentences. A cloud may glow_over a hill.Logical formLearned from21 sentences. Clouds can be swollen.Logical formLearned from21 sentences. Dark clouds can be constituted-of-or-filled-with nuclear war.Logical formLearned from21 sentences. (Heat clouds) may kill some persons.Logical formLearned from21 sentences. Clouds can be constituted-of-or-filled-with teargas.Logical formLearned from21 sentences.