Question: a political system that is ruled by a few is called
[{'answer': 'Oligarchy', 'provenance': [{'wikipedia_id': '542341', 'title': 'List of forms of government', 'start_paragraph_id': 6, 'start_character': 57, 'end_paragraph_id': 6, 'end_character': 66, 'bleu_score': 1.0, 'section': 'Section::::Forms of government by power source.:Types of democracy.\n'}]}]