Progress can be under clouds.Logical formLearned from7 sentences. (Oil prices) can be a cloud.Logical formLearned from7 sentences. A cloud of smoke may rise.Logical formLearned from7 sentences. Clouds may pertain-to a war.Logical formLearned from7 sentences. Balls of smoke may merge into a cloud.Logical formLearned from7 sentences. (War clouds) may thicken over a country.Logical formLearned from7 sentences. A situation can be a cloud.Logical formLearned from7 sentences. (Storm clouds) may be dissipated.Logical formLearned from7 sentences. Clouds can be constituted-of-or-filled-with heat.Logical formLearned from7 sentences. A (mushroom cloud) can be over a town.Logical formLearned from7 sentences. Magnitude may send_up a (mushroom cloud).Logical formLearned from7 sentences. A response can be to an (ash cloud).Logical formLearned from6 sentences. (Ash clouds) can be from an icelandic volcano.Logical formLearned from6 sentences. A collision can be with a (debris cloud).Logical formLearned from6 sentences. (Smoke clouds) can be black.Logical formLearned from6 sentences.