A countenance may undergo an expression.Logical formLearned from114 sentences. A soul may undergo an expression.Logical formLearned from114 sentences. A blank expression can be on a face.Logical formLearned from114 sentences. An expression can be pensive.Logical formLearned from114 sentences. Molecules may undergo an expression.Logical formLearned from113 sentences. A level can be constituted-of-or-filled-with expression.Logical formLearned from113 sentences. An expression can be pleased.Logical formLearned from113 sentences. Sadness may undergo an expression.Logical formLearned from113 sentences. An expression can be anxious.Logical formLearned from113 sentences. A need may undergo an expression.Logical formLearned from113 sentences. Values may undergo an expression.Logical formLearned from112 sentences. An expression can be aberrant.Logical formLearned from111 sentences. Expressions can be serious.Logical formLearned from111 sentences. Relief may undergo an expression.Logical formLearned from111 sentences. An expression can be tired.Logical formLearned from111 sentences.