Question: who has won the most best actress awards
[{'answer': 'Katharine Hepburn', 'provenance': [{'wikipedia_id': '18739638', 'title': 'List of actors with two or more Academy Awards in acting categories', 'start_paragraph_id': 2, 'start_character': 89, 'end_paragraph_id': 2, 'end_character': 106, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '18739638', 'title': 'List of actors with two or more Academy Awards in acting categories', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 778, 'bleu_score': 0.893028939117918, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13262330211595852296}, 'section': 'Section::::Abstract.'}]}]