Question: who holds the women's 800m world record
[{'answer': 'Jarmila Kratochvílová', 'provenance': [{'wikipedia_id': '585165', 'title': '800 metres', 'start_paragraph_id': 4, 'start_character': 133, 'end_paragraph_id': 4, 'end_character': 154, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]