Sources can be constituted-of-or-filled-with pollution.Logical formLearned from1 227 sentences. Pollution can be toxic.Logical formLearned from719 sentences. Pollution can be serious.Logical formLearned from662 sentences. Levels can be constituted-of-or-filled-with pollution.Logical formLearned from584 sentences. A source can be constituted-of-or-filled-with pollution.Logical formLearned from530 sentences. Pollution can be heavy.Logical formLearned from510 sentences. Pollution can be urban.Logical formLearned from426 sentences. Pollution can be increased.Logical formLearned from372 sentences. Levels can be constituted-of-or-filled-with (air pollution).Logical formLearned from326 sentences. Pollution may pertain-to a world-city.Logical formLearned from305 sentences. An environment may undergo pollution.Logical formLearned from301 sentences. Cancers may undergo pollution.Logical formLearned from294 sentences. Pollution may undergo a prevention.Logical formLearned from249 sentences. Pollution can be coastal.Logical formLearned from249 sentences. An (air pollution) can be serious.Logical formLearned from242 sentences.