A flu may spread_around the world.Logical formLearned from12 sentences. A man may contract flu on a honeymoon.Logical formLearned from12 sentences. Threats can be from avian flu.Logical formLearned from12 sentences. A pandemic alert can be for flu.Logical formLearned from12 sentences. Persons may report (flu symptoms).Logical formLearned from12 sentences. Deaths may be believed be caused by flu.Logical formLearned from12 sentences. (Bird flu outbreaks) can be around the world.Logical formLearned from12 sentences. Chickens may be suspected of carrying (bird flu).Logical formLearned from12 sentences. A (bird flu virus) may kill humans.Logical formLearned from12 sentences. A (flu virus) may shift to a strain.Logical formLearned from12 sentences. (Bird flu) can be a problem.Logical formLearned from12 sentences. (Bird flu) may be suspected.Logical formLearned from12 sentences. A strain of (bird flu) may be confirmed.Logical formLearned from12 sentences. A variant can be constituted-of-or-filled-with (bird flu).Logical formLearned from12 sentences. Worries can be over (bird flu).Logical formLearned from12 sentences.