Question: when does leo have a heart attack on west wing
[{'answer': 'On Election Night', 'provenance': [{'wikipedia_id': '976264', 'title': 'Leo McGarry', 'start_paragraph_id': 20, 'start_character': 0, 'end_paragraph_id': 20, 'end_character': 17, 'bleu_score': 1.0, 'section': 'Section::::Character biography.:2006 vice presidential campaign.\n'}]}, {'provenance': [{'wikipedia_id': '976264', 'title': 'Leo McGarry', 'start_paragraph_id': 20, 'start_character': 0, 'end_paragraph_id': 20, 'end_character': 944, 'bleu_score': 0.9656550124413411, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11625585655502064049}, 'section': 'Section::::Character biography.:2006 vice presidential campaign.\n'}]}]