Gender may undergo an expression.Logical formLearned from19 sentences. Citizenship may undergo an expression.Logical formLearned from19 sentences. Integrins may undergo an expression.Logical formLearned from19 sentences. Dignity may undergo an expression.Logical formLearned from19 sentences. Faces may undergo expressions.Logical formLearned from19 sentences. (Growth factors) may undergo an expression.Logical formLearned from19 sentences. An (expression change) may pertain-to a female.Logical formLearned from19 sentences. An expression may come to mind.Logical formLearned from19 sentences. An expression may soften a bit.Logical formLearned from19 sentences. An expression can be unfathomable.Logical formLearned from19 sentences. An expression can be hardened.Logical formLearned from19 sentences. A face may take_on an expression.Logical formLearned from19 sentences. Qualities may undergo an expression.Logical formLearned from19 sentences. Facial expressions can be hilarious.Logical formLearned from19 sentences. An (expression number) may pertain-to a person.Logical formLearned from19 sentences.