A (bird flu patient) may pertain-to a country.Logical formLearned from13 sentences. (Bird flu) may undergo a (death toll).Logical formLearned from13 sentences. A (bird flu) may undergo a transmission.Logical formLearned from13 sentences. Some (bird flu cases) can be in a country.Logical formLearned from13 sentences. A country can be free from (bird flu).Logical formLearned from13 sentences. (Bird flu) may mutate into a disease.Logical formLearned from13 sentences. (Bird flu patients) may undergo a treatment.Logical formLearned from13 sentences. (Bird flu) can be in a province.Logical formLearned from13 sentences. (Bird flu) can be endemic.Logical formLearned from13 sentences. A (bird flu patient) may be detected in a country.Logical formLearned from13 sentences. An end can be to a (bird flu).Logical formLearned from13 sentences. A country may report (bird flu cases).Logical formLearned from13 sentences. A (bird flu outbreak) can be in a world-city.Logical formLearned from13 sentences. Reports can be constituted-of-or-filled-with flu.Logical formLearned from13 sentences. A (bird flu virus) can be in a continent.Logical formLearned from13 sentences.