Options can be mandatory.Logical formLearned from23 sentences. Visits can be mandatory.Logical formLearned from23 sentences. (Sentencing policies) can be mandatory.Logical formLearned from23 sentences. A (vaccination program) can be mandatory.Logical formLearned from23 sentences. Workers can be mandatory.Logical formLearned from23 sentences. A male may reach mandatory (retirement age).Logical formLearned from23 sentences. A proposal can be mandatory.Logical formLearned from23 sentences. Investments can be mandatory.Logical formLearned from23 sentences. (Seat belt laws) can be mandatory.Logical formLearned from23 sentences. Commitments can be mandatory.Logical formLearned from23 sentences. A briefing can be mandatory.Logical formLearned from23 sentences. (Conservation measures) can be mandatory.Logical formLearned from23 sentences. A (seat-belt law) can be mandatory.Logical formLearned from23 sentences. Grants can be mandatory.Logical formLearned from23 sentences. An award can be mandatory.Logical formLearned from23 sentences.