Some persons may contract (bird flu).Logical formLearned from26 sentences. Countries may fight (bird flu).Logical formLearned from26 sentences. Traces can be constituted-of-or-filled-with (bird flu).Logical formLearned from26 sentences. Humans may contract (bird flu).Logical formLearned from25 sentences. A country may report (bird flu outbreaks).Logical formLearned from25 sentences. Cases can be constituted-of-or-filled-with (bird flu infection).Logical formLearned from25 sentences. A (bird flu case) can be confirmed.Logical formLearned from25 sentences. A (bird flu patient) can be suspected.Logical formLearned from25 sentences. Reports can be constituted-of-or-filled-with (bird flu cases).Logical formLearned from25 sentences. Efforts can be against (bird flu).Logical formLearned from25 sentences. A flu can be sudden.Logical formLearned from25 sentences. An avian flu can be deadly.Logical formLearned from25 sentences. A (stomach flu) can be nasty.Logical formLearned from25 sentences. (Flu season) can be worst.Logical formLearned from25 sentences. A (flu epidemic) can be an anthrax.Logical formLearned from25 sentences.