Question: by tradition which state’s caucus is the first presidential contest held every four years
[{'answer': 'Iowa', 'provenance': [{'wikipedia_id': '185311', 'title': 'United States presidential primary', 'start_paragraph_id': 3, 'start_character': 429, 'end_paragraph_id': 3, 'end_character': 433, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '185311', 'title': 'United States presidential primary', 'start_paragraph_id': 55, 'start_character': 0, 'end_paragraph_id': 55, 'end_character': 819, 'bleu_score': 0.985238839858627, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3830173115904349033}, 'section': 'Section::::Calendar.:Iowa and New Hampshire.\n'}]}]