Question: how many drawn grand finals have there been in vfl/afl history
[{'answer': 'four', 'provenance': [{'wikipedia_id': '3393693', 'title': 'AFL Grand Final', 'start_paragraph_id': 6, 'start_character': 436, 'end_paragraph_id': 6, 'end_character': 440, 'bleu_score': 1.0, 'section': 'Section::::Game history.:1897–1901: Origins.\n'}]}, {'provenance': [{'wikipedia_id': '3393693', 'title': 'AFL Grand Final', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 676, 'bleu_score': 0.9826823455989031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6746975519678753813}, 'section': 'Section::::Game history.:1897–1901: Origins.\n'}]}]