(Skin diseases) can be chronic.Logical formLearned from33 sentences. A disease may be caused by a bacterium.Logical formLearned from33 sentences. A disease can be an epidemic.Logical formLearned from33 sentences. Persons can be with periodontal disease.Logical formLearned from33 sentences. Some persons may die of disease.Logical formLearned from33 sentences. Disease may be aggravated by droughts.Logical formLearned from33 sentences. New diseases may emerge.Logical formLearned from33 sentences. A new disease can be deadly.Logical formLearned from33 sentences. A (mystery disease) can be deadly.Logical formLearned from33 sentences. Signs can be constituted-of-or-filled-with mad disease.Logical formLearned from33 sentences. A disease can be in sheep.Logical formLearned from33 sentences. Fears can be constituted-of-or-filled-with (disease outbreaks).Logical formLearned from33 sentences. Some nations may tackle a disease.Logical formLearned from33 sentences. A disease may undergo a propagation.Logical formLearned from33 sentences. A disease may pertain-to mad cow.Logical formLearned from33 sentences.