Question: who became the king of england in 1830
[{'answer': 'William IV', 'provenance': [{'wikipedia_id': '43271', 'title': 'William IV of the United Kingdom', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 10, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]