A flu may pertain-to history.Logical formLearned from54 sentences. A (flu outbreak) can be global.Logical formLearned from54 sentences. Signs can be constituted-of-or-filled-with flu.Logical formLearned from54 sentences. Signs may pertain-to a flu.Logical formLearned from54 sentences. A person may have a (stomach flu).Logical formLearned from53 sentences. A (bird flu virus) can be pathogenic.Logical formLearned from53 sentences. A male may suffer from a flu.Logical formLearned from53 sentences. A (flu season) may start.Logical formLearned from53 sentences. Outbreaks can be constituted-of-or-filled-with (bird flu).Logical formLearned from53 sentences. Fears can be constituted-of-or-filled-with flu.Logical formLearned from53 sentences. (Bird flu) may be detected.Logical formLearned from52 sentences. A (bird flu) can be mysterious.Logical formLearned from51 sentences. (Bird flu) can be in a country.Logical formLearned from51 sentences. Some persons may die from flu.Logical formLearned from51 sentences. (Flu vaccines) can be regular.Logical formLearned from51 sentences.