Question: who has run for president the most times
[{'answer': 'Harold Stassen', 'provenance': [{'wikipedia_id': '895415', 'title': 'Perennial candidate', 'start_paragraph_id': 140, 'start_character': 564, 'end_paragraph_id': 140, 'end_character': 578, 'bleu_score': 1.0, 'section': 'Section::::United States.:Eastern states.\n'}]}, {'provenance': [{'wikipedia_id': '895415', 'title': 'Perennial candidate', 'start_paragraph_id': 191, 'start_character': 0, 'end_paragraph_id': 191, 'end_character': 546, 'bleu_score': 0.9163801224442231, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 376098693693700402}, 'section': 'Section::::United States.:More.\n'}]}]