Articles may undergo a classification.Logical formLearned from8 sentences. Theories may undergo a classification.Logical formLearned from8 sentences. A (classification system) may compare an amount of elements to an amount of silica.Logical formLearned from8 sentences. Publications may undergo a classification.Logical formLearned from8 sentences. Elementary particles may undergo a classification.Logical formLearned from8 sentences. (Classification matches) can be for place.Logical formLearned from8 sentences. A country may continue to (classification matches).Logical formLearned from8 sentences. (Classification systems) can be faceted.Logical formLearned from8 sentences. A male may undergo classifications.Logical formLearned from8 sentences. A classification can be desired.Logical formLearned from8 sentences. Classifications can be varying.Logical formLearned from8 sentences. A classification can be subjective.Logical formLearned from8 sentences. Types may undergo a classification.Logical formLearned from8 sentences. A classification may be adopted.Logical formLearned from8 sentences. A classification can be open.Logical formLearned from8 sentences.