An international treaty can be solemn.Logical formLearned from6 sentences. A use can be solemn.Logical formLearned from6 sentences. A frown can be solemn.Logical formLearned from6 sentences. A farce can be solemn.Logical formLearned from6 sentences. An interview can be solemn.Logical formLearned from6 sentences. A mask can be solemn.Logical formLearned from6 sentences. A tour can be solemn.Logical formLearned from6 sentences. A stop can be solemn.Logical formLearned from6 sentences. A (memorial meeting) can be solemn.Logical formLearned from6 sentences. A (treaty commitment) can be solemn.Logical formLearned from6 sentences. A row can be solemn.Logical formLearned from6 sentences. A meeting can be solemn.Logical formLearned from6 sentences. A demeanor can be solemn.Logical formLearned from6 sentences. A departure can be solemn.Logical formLearned from6 sentences. A (dawn ceremony) can be solemn.Logical formLearned from6 sentences.