Question: who were the leaders of both sides of the english civil war
[{'answer': 'King Charles I', 'provenance': [{'wikipedia_id': '9709', 'title': 'English Civil War', 'start_paragraph_id': 1, 'start_character': 289, 'end_paragraph_id': 1, 'end_character': 303, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Prince Rupert of the Rhine'}, {'answer': 'Charles II', 'provenance': [{'wikipedia_id': '9709', 'title': 'English Civil War', 'start_paragraph_id': 1, 'start_character': 419, 'end_paragraph_id': 1, 'end_character': 429, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Earl of Essex', 'provenance': [{'wikipedia_id': '9709', 'title': 'English Civil War', 'start_paragraph_id': 53, 'start_character': 307, 'end_paragraph_id': 53, 'end_character': 320, 'bleu_score': 1.0, 'section': 'Section::::First English Civil War (1642–1646).\n'}]}, {'answer': 'Thomas Fairfax', 'provenance': [{'wikipedia_id': '9709', 'title': 'English Civil War', 'start_paragraph_id': 62, 'start_character': 275, 'end_paragraph_id': 62, 'end_character': 289, 'bleu_score': 1.0, 'section': 'Section::::First English Civil War (1642–1646).\n'}]}, {'answer': 'Oliver Cromwell', 'provenance': [{'wikipedia_id': '9709', 'title': 'English Civil War', 'start_paragraph_id': 2, 'start_character': 273, 'end_paragraph_id': 2, 'end_character': 288, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]