Pollution may be emitted.Logical formLearned from16 sentences. A sign can be constituted-of-or-filled-with pollution.Logical formLearned from16 sentences. Threat can be from pollution.Logical formLearned from16 sentences. Pollution may undergo a definition.Logical formLearned from16 sentences. An (air pollution index) may pertain-to a city.Logical formLearned from16 sentences. Pollution can be from chemicals.Logical formLearned from16 sentences. Pollution can be in rivers.Logical formLearned from16 sentences. Pollution may be generated throughout a us-state.Logical formLearned from16 sentences. Pollution may undergo a detection.Logical formLearned from16 sentences. A (cancer risk) can be from (air pollution).Logical formLearned from16 sentences. Pollution may pertain-to a nation.Logical formLearned from16 sentences. A (pollution control equipment) can be state-of-the-art.Logical formLearned from16 sentences. A majority may pertain-to pollution.Logical formLearned from16 sentences. Pollution can be from mining.Logical formLearned from16 sentences. Pollution may spread.Logical formLearned from16 sentences.