A (mushroom cloud) can be black.Logical formLearned from16 sentences. Clouds of smoke may appear over a complex.Logical formLearned from16 sentences. Routes can be through an (ash cloud).Logical formLearned from16 sentences. An (ash cloud) can be from a volcanic eruption.Logical formLearned from16 sentences. Dark clouds of nuclear war may gather over a peninsula.Logical formLearned from16 sentences. Clouds may undergo an abundance.Logical formLearned from16 sentences. A cloud can be constituted-of-or-filled-with butterflies.Logical formLearned from16 sentences. A cloud can be solid.Logical formLearned from15 sentences. Cloud may start.Logical formLearned from15 sentences. Shadows can be constituted-of-or-filled-with clouds.Logical formLearned from15 sentences. A trial may pertain-to cloud.Logical formLearned from15 sentences. Clouds can be overhead.Logical formLearned from15 sentences. (Dust clouds) can be dark.Logical formLearned from15 sentences. A surface may pertain-to a cloud.Logical formLearned from15 sentences. A dark cloud can be thick.Logical formLearned from15 sentences.