Question: where are leads 1 2 and 3 placed
[{'answer': 'the limbs', 'provenance': [{'wikipedia_id': '76988', 'title': 'Electrocardiography', 'start_paragraph_id': 43, 'start_character': 103, 'end_paragraph_id': 43, 'end_character': 112, 'bleu_score': 1.0, 'section': 'Section::::Electrodes and leads.:Limb leads.\n'}]}, {'provenance': [{'wikipedia_id': '76988', 'title': 'Electrocardiography', 'start_paragraph_id': 43, 'start_character': 0, 'end_paragraph_id': 43, 'end_character': 227, 'bleu_score': 0.9560167778278961, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18423071428994911186}, 'section': 'Section::::Electrodes and leads.:Limb leads.\n'}]}]