(Classification requirements) can be strict.Logical formLearned from41 sentences. Property may undergo a classification.Logical formLearned from41 sentences. Areas may undergo a classification.Logical formLearned from40 sentences. Mental disorders may undergo a classification.Logical formLearned from40 sentences. Classifications can be basic.Logical formLearned from40 sentences. Changes can be in classification.Logical formLearned from40 sentences. Methods can be constituted-of-or-filled-with classification.Logical formLearned from40 sentences. A classification may pertain-to a us-state.Logical formLearned from39 sentences. A basis can be for classification.Logical formLearned from39 sentences. A level can be constituted-of-or-filled-with classification.Logical formLearned from39 sentences. A classification can be psychiatric.Logical formLearned from39 sentences. Disorders may undergo a classification.Logical formLearned from38 sentences. Students may undergo a classification.Logical formLearned from37 sentences. Materials may undergo a classification.Logical formLearned from37 sentences. A (patent classification system) may pertain-to a country.Logical formLearned from36 sentences.