A mayor can be unofficial.Logical formLearned from177 sentences. An event can be unofficial.Logical formLearned from175 sentences. A national anthem can be unofficial.Logical formLearned from169 sentences. An information can be unofficial.Logical formLearned from169 sentences. Sites can be unofficial.Logical formLearned from166 sentences. A copy can be unofficial.Logical formLearned from160 sentences. Copies can be unofficial.Logical formLearned from160 sentences. Congregations can be unofficial.Logical formLearned from151 sentences. A truce can be unofficial.Logical formLearned from149 sentences. A referendum can be unofficial.Logical formLearned from145 sentences. A guide can be unofficial.Logical formLearned from139 sentences. A historian can be unofficial.Logical formLearned from138 sentences. A delegation can be unofficial.Logical formLearned from136 sentences. A nickname can be unofficial.Logical formLearned from131 sentences. A source can be unofficial.Logical formLearned from130 sentences.