Question: where is the lens of the eye located
[{'answer': 'the anterior segment', 'provenance': [{'wikipedia_id': '305465', 'title': 'Lens (anatomy)', 'start_paragraph_id': 4, 'start_character': 20, 'end_paragraph_id': 4, 'end_character': 40, 'bleu_score': 1.0, 'section': 'Section::::Structure.\n'}]}, {'provenance': [{'wikipedia_id': '305465', 'title': 'Lens (anatomy)', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 802, 'bleu_score': 0.9866213202385071, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2817083783215139871}, 'section': 'Section::::Structure.\n'}]}]