Question: when did the u.s. navy move the headquarters of the pacific fleet from the west coast to hawaii
[{'answer': 'May 1940', 'provenance': [{'wikipedia_id': '165220', 'title': 'United States Pacific Fleet', 'start_paragraph_id': 3, 'start_character': 322, 'end_paragraph_id': 3, 'end_character': 330, 'bleu_score': 1.0, 'section': 'Section::::Origins.\n'}]}, {'provenance': [{'wikipedia_id': '165220', 'title': 'United States Pacific Fleet', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 909, 'bleu_score': 0.9868845362499331, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5885068909114506098}, 'section': 'Section::::Origins.\n'}]}]