Question: how does the lens of the eye change shape
[{'answer': 'accommodation', 'provenance': [{'wikipedia_id': '305465', 'title': 'Lens (anatomy)', 'start_paragraph_id': 1, 'start_character': 398, 'end_paragraph_id': 1, 'end_character': 411, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '305465', 'title': 'Lens (anatomy)', 'start_paragraph_id': 29, 'start_character': 0, 'end_paragraph_id': 29, 'end_character': 475, 'bleu_score': 0.894717778276866, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2423071003434776315}, 'section': 'Section::::Function.:Accommodation.\n'}]}]