A challenge can be virulent.Logical formLearned from15 sentences. An enemy can be virulent.Logical formLearned from15 sentences. A spread can be virulent.Logical formLearned from15 sentences. A fungus can be virulent.Logical formLearned from15 sentences. An ideology can be virulent.Logical formLearned from15 sentences. A subtype can be virulent.Logical formLearned from15 sentences. Species can be virulent.Logical formLearned from14 sentences. Anti-semites can be virulent.Logical formLearned from14 sentences. A feed can be virulent.Logical formLearned from14 sentences. Types can be virulent.Logical formLearned from14 sentences. An anthrax can be virulent.Logical formLearned from14 sentences. An expression can be virulent.Logical formLearned from14 sentences. Anti-immigrants can be virulent.Logical formLearned from14 sentences. A partisanship can be virulent.Logical formLearned from14 sentences. A (flu virus) can be virulent.Logical formLearned from14 sentences.