Waters may pertain-to a continent.Logical formLearned from50 sentences. Changes can be in (water chemistry).Logical formLearned from49 sentences. (Drinking water) may undergo pollution.Logical formLearned from49 sentences. A (water supply) can be clean.Logical formLearned from49 sentences. A (river water) can be polluted.Logical formLearned from49 sentences. (Water systems) can be urban.Logical formLearned from49 sentences. Water may contain chemicals.Logical formLearned from49 sentences. A (drinking water) may pertain-to a town.Logical formLearned from49 sentences. Standards can be for (drinking water).Logical formLearned from49 sentences. Water may undergo a formation.Logical formLearned from49 sentences. Water can be smelly.Logical formLearned from49 sentences. Some percent can be constituted-of-or-filled-with water.Logical formLearned from49 sentences. A male may take water.Logical formLearned from49 sentences. A male may want water.Logical formLearned from49 sentences. Colors may pertain-to waters.Logical formLearned from49 sentences.