Question: who discovered the direction of magnetic field lines
[{'answer': 'André - Marie Ampère', 'provenance': [{'wikipedia_id': '36563', 'title': 'Magnetic field', 'start_paragraph_id': 9, 'start_character': 188, 'end_paragraph_id': 9, 'end_character': 213, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '36563', 'title': 'Magnetic field', 'start_paragraph_id': 9, 'start_character': 0, 'end_paragraph_id': 9, 'end_character': 537, 'bleu_score': 0.538355167443, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9117867860312399495}, 'section': 'Section::::History.\n'}]}]