Question: who fought at the battle of the boyne
[{'answer': 'Jacobite forces'}, {'answer': 'Williamite forces', 'provenance': [{'wikipedia_id': '68318', 'title': 'Battle of the Boyne', 'start_paragraph_id': 21, 'start_character': 419, 'end_paragraph_id': 21, 'end_character': 436, 'bleu_score': 1.0, 'section': 'Section::::The battle.\n'}]}]