A (cholera epidemic) may pertain-to a world-city.Logical formLearned from19 sentences. A (phylloxera epidemic) may pertain-to a century.Logical formLearned from19 sentences. A factor can be in an epidemic.Logical formLearned from19 sentences. Challenges may be posed by an epidemic.Logical formLearned from19 sentences. Characteristics may pertain-to an epidemic.Logical formLearned from19 sentences. An epidemic may pertain-to a flu.Logical formLearned from19 sentences. An epidemic may lower a productivity.Logical formLearned from19 sentences. An epidemic can be black.Logical formLearned from19 sentences. An epidemic can be unrecognized.Logical formLearned from19 sentences. A role can be in an epidemic.Logical formLearned from19 sentences. An epidemic may strike a group.Logical formLearned from19 sentences. Response can be to epidemics.Logical formLearned from19 sentences. An epidemic may undergo a containment.Logical formLearned from19 sentences. Epidemics may pertain-to history.Logical formLearned from19 sentences. An epidemic may take a toll.Logical formLearned from19 sentences.