E-mails can be sad.Logical formLearned from6 sentences. A person can be sad for students.Logical formLearned from6 sentences. A day can be sad.Logical formLearned from6 sentences. A site can be sad.Logical formLearned from5 sentences. A touch can be sad.Logical formLearned from5 sentences. A perspective can be sad.Logical formLearned from5 sentences. Fountains can be sad.Logical formLearned from5 sentences. A detective can be sad.Logical formLearned from5 sentences. Tragedies can be sad.Logical formLearned from5 sentences. An emperor can be sad.Logical formLearned from5 sentences. A maiden can be sad.Logical formLearned from5 sentences. A position can be sad.Logical formLearned from5 sentences. Tigers can be sad.Logical formLearned from5 sentences. A narrator can be sad.Logical formLearned from5 sentences. An elegy can be sad.Logical formLearned from5 sentences.