A registration can be compulsory.Logical formLearned from201 sentences. Rounds can be compulsory.Logical formLearned from195 sentences. Voting can be compulsory.Logical formLearned from173 sentences. Reading can be compulsory.Logical formLearned from172 sentences. A (school attendance) can be compulsory.Logical formLearned from171 sentences. Fees can be compulsory.Logical formLearned from163 sentences. A testing can be compulsory.Logical formLearned from152 sentences. An (education system) can be compulsory.Logical formLearned from144 sentences. A heterosexuality can be compulsory.Logical formLearned from144 sentences. A module can be compulsory.Logical formLearned from143 sentences. Measures can be compulsory.Logical formLearned from137 sentences. Contributions can be compulsory.Logical formLearned from137 sentences. A training can be compulsory.Logical formLearned from136 sentences. A (retirement age) can be compulsory.Logical formLearned from125 sentences. A primary education can be compulsory.Logical formLearned from124 sentences.