A fog can be ubiquitous.Logical formLearned from8 sentences. A fog may cause problems.Logical formLearned from8 sentences. A fog can be polar.Logical formLearned from8 sentences. A fog may end.Logical formLearned from8 sentences. Fog may be enabled.Logical formLearned from8 sentences. Fog may come_down.Logical formLearned from8 sentences. Fog may prevent some skiers from starting.Logical formLearned from8 sentences. Fog may cause a delay.Logical formLearned from8 sentences. Anxiety can be about fog.Logical formLearned from8 sentences. Some vehicles may drive_off into a (morning fog).Logical formLearned from8 sentences. Fog may clear.Logical formLearned from8 sentences. Persons can be in a fog.Logical formLearned from8 sentences. A (fog bank) can be dense.Logical formLearned from8 sentences. A fog can be in an area.Logical formLearned from8 sentences. Fog can be with a (container ship).Logical formLearned from8 sentences.