Questions can be necessary.Logical formLearned from14 sentences. A struggle can be necessary.Logical formLearned from14 sentences. Military actions can be necessary.Logical formLearned from14 sentences. Contributions can be necessary.Logical formLearned from14 sentences. A plebiscite can be necessary.Logical formLearned from14 sentences. A story can be necessary.Logical formLearned from14 sentences. A military can be necessary.Logical formLearned from14 sentences. Persons may have necessary conditions.Logical formLearned from14 sentences. Supplies can be necessary.Logical formLearned from14 sentences. Presence of troops can be necessary.Logical formLearned from13 sentences. A change may be deemed necessary.Logical formLearned from13 sentences. An interaction can be necessary.Logical formLearned from13 sentences. Sugar can be necessary.Logical formLearned from13 sentences. Skills can be necessary for leadership.Logical formLearned from13 sentences. A cause can be necessary.Logical formLearned from13 sentences.