Question: when did us open move to flushing meadows
[{'answer': '1978', 'provenance': [{'wikipedia_id': '82729', 'title': 'US Open (tennis)', 'start_paragraph_id': 3, 'start_character': 214, 'end_paragraph_id': 3, 'end_character': 218, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '82729', 'title': 'US Open (tennis)', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 658, 'bleu_score': 0.599516223446882, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16039084461571051411}, 'section': 'Section::::Abstract.'}]}]