Question: in exfoliative cytology the cells for examination are obtained by
[{'answer': 'spontaneously shed by the body', 'provenance': [{'wikipedia_id': '188524', 'title': 'Cytopathology', 'start_paragraph_id': 8, 'start_character': 64, 'end_paragraph_id': 8, 'end_character': 94, 'bleu_score': 1.0, 'section': 'Section::::Cell collection.:Exfoliative cytology.\n'}]}, {'answer': 'or manually scraped / brushed off of a surface in the body'}, {'provenance': [{'wikipedia_id': '188524', 'title': 'Cytopathology', 'start_paragraph_id': 8, 'start_character': 0, 'end_paragraph_id': 8, 'end_character': 890, 'bleu_score': 0.837639392341597, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16256286489634193888}, 'section': 'Section::::Cell collection.:Exfoliative cytology.\n'}]}]