Fog may cause an accident.Logical formLearned from9 sentences. Visibility can be in (morning fog).Logical formLearned from9 sentences. A (bus journey) can be through fog.Logical formLearned from9 sentences. A (valley fog) can be dense.Logical formLearned from9 sentences. A race may be delayed for some minutes by fog.Logical formLearned from9 sentences. A result may pertain-to a fog.Logical formLearned from9 sentences. A fog may envelop parts of a country.Logical formLearned from9 sentences. (Radar screens) can be in fog.Logical formLearned from9 sentences. An (air force) may crash in fog.Logical formLearned from9 sentences. A mountain may be shrouded in fog.Logical formLearned from9 sentences. Fog may be smothered.Logical formLearned from8 sentences. Fog may disrupt air.Logical formLearned from8 sentences. A fog may shift.Logical formLearned from8 sentences. A (fog signal) may be discontinued.Logical formLearned from8 sentences. A fog can be dusty.Logical formLearned from8 sentences.