Experiences may undergo an expression.Logical formLearned from23 sentences. An expression can be timeless.Logical formLearned from23 sentences. Facial expressions may undergo recognition.Logical formLearned from23 sentences. An antigen may undergo an expression.Logical formLearned from23 sentences. An expression may alter.Logical formLearned from23 sentences. An expression can be sombre.Logical formLearned from23 sentences. An expression may pertain-to a philosopher.Logical formLearned from23 sentences. A face may show an expression.Logical formLearned from23 sentences. An expression can be vulnerable.Logical formLearned from23 sentences. An expression can be convenient.Logical formLearned from23 sentences. Condolences may undergo an expression.Logical formLearned from23 sentences. Aspirations may undergo an expression.Logical formLearned from23 sentences. A face may be set in an expression.Logical formLearned from23 sentences. An expression can be persistent.Logical formLearned from22 sentences. Talents may undergo an expression.Logical formLearned from22 sentences.