Periods can be unhealthy.Logical formLearned from3 sentences. (Tobacco products) can be unhealthy.Logical formLearned from3 sentences. A river can be unhealthy.Logical formLearned from3 sentences. Women can be unhealthy.Logical formLearned from3 sentences. An undertone can be unhealthy.Logical formLearned from3 sentences. A (stress level) can be unhealthy.Logical formLearned from3 sentences. (Acid rain) can be unhealthy for lakes.Logical formLearned from3 sentences. A loss can be unhealthy.Logical formLearned from3 sentences. Advertisements can be unhealthy.Logical formLearned from3 sentences. A song can be unhealthy.Logical formLearned from3 sentences. A (heart muscle) can be unhealthy.Logical formLearned from3 sentences. Pregnancies can be unhealthy.Logical formLearned from3 sentences. Changes can be unhealthy.Logical formLearned from3 sentences. Gaps can be unhealthy.Logical formLearned from3 sentences. Vapours can be unhealthy.Logical formLearned from3 sentences.