Question: when did the battle of bunker hill happen
[{'answer': 'June 17 , 1775', 'provenance': [{'wikipedia_id': '163162', 'title': 'Battle of Bunker Hill', 'start_paragraph_id': 1, 'start_character': 40, 'end_paragraph_id': 1, 'end_character': 54, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '163162', 'title': 'Battle of Bunker Hill', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 426, 'bleu_score': 0.972782728923768, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17609235668466101308}, 'section': 'Section::::Abstract.'}]}]