Question: which term is used in us politics for a significant party outside the two dominant parties
[{'answer': 'third party', 'provenance': [{'wikipedia_id': '31605', 'title': 'Two-party system', 'start_paragraph_id': 21, 'start_character': 127, 'end_paragraph_id': 21, 'end_character': 138, 'bleu_score': 1.0, 'section': 'Section::::Examples.:United States.\n'}]}, {'provenance': [{'wikipedia_id': '31605', 'title': 'Two-party system', 'start_paragraph_id': 21, 'start_character': 0, 'end_paragraph_id': 21, 'end_character': 1040, 'bleu_score': 0.972233322266093, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2836029810397464911}, 'section': 'Section::::Examples.:United States.\n'}]}]