Dust can be alkaline.Logical formLearned from19 sentences. A lander may take an image of a particle of dust.Logical formLearned from19 sentences. A smell may pertain-to dust.Logical formLearned from19 sentences. A line can be constituted-of-or-filled-with dust.Logical formLearned from19 sentences. Levels can be constituted-of-or-filled-with (coal dust).Logical formLearned from19 sentences. Traces can be constituted-of-or-filled-with dust.Logical formLearned from19 sentences. Dust can be from a debris of a home.Logical formLearned from19 sentences. Dust can be on a floor.Logical formLearned from19 sentences. Dust can be from a desert.Logical formLearned from19 sentences. Exposure can be to (trade center dust).Logical formLearned from18 sentences. Allergies can be to dust.Logical formLearned from18 sentences. Dust may be generated.Logical formLearned from18 sentences. A (dust storm) can be regional.Logical formLearned from18 sentences. Dust can be urban.Logical formLearned from18 sentences. (Dust particles) can be cometary.Logical formLearned from18 sentences.