A that can be sad.Logical formLearned from30 sentences. Children can be sad.Logical formLearned from30 sentences. A conversation can be sad.Logical formLearned from30 sentences. A homecoming can be sad.Logical formLearned from30 sentences. A comedy can be sad.Logical formLearned from30 sentences. A holiday can be sad.Logical formLearned from30 sentences. Developments can be sad.Logical formLearned from30 sentences. A proof can be sad.Logical formLearned from30 sentences. A remembrance can be sad.Logical formLearned from29 sentences. A line can be sad.Logical formLearned from29 sentences. A summer can be sad.Logical formLearned from29 sentences. An appearance can be sad.Logical formLearned from29 sentences. Ironies can be sad.Logical formLearned from29 sentences. A tab can be sad.Logical formLearned from29 sentences. A person can be sad.Logical formLearned from29 sentences.