Question: what date is the grand national run on
[{'answer': '4 April 2019'}, {'provenance': [{'wikipedia_id': '74730', 'title': 'Grand National', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 290, 'bleu_score': 0.725454998915349, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15651787922017568458}, 'section': 'Section::::Abstract.'}]}]