A referendum can be necessary.Logical formLearned from19 sentences. A round of voting can be necessary.Logical formLearned from19 sentences. A tax can be necessary.Logical formLearned from19 sentences. Necessary conditions may undergo a creation.Logical formLearned from19 sentences. A (rescue mission) can be necessary.Logical formLearned from18 sentences. A summit can be necessary.Logical formLearned from18 sentences. Some meeting can be necessary.Logical formLearned from18 sentences. Conversion can be necessary.Logical formLearned from18 sentences. Skills can be necessary for a job.Logical formLearned from18 sentences. Rule can be necessary.Logical formLearned from18 sentences. Reasoning can be necessary.Logical formLearned from18 sentences. Learning can be necessary.Logical formLearned from18 sentences. A trial can be necessary.Logical formLearned from18 sentences. A calculation can be necessary.Logical formLearned from18 sentences. (Dose adjustments) can be necessary.Logical formLearned from18 sentences.