Question: when did the government establish the hong kong housing authority
[{'answer': '1973', 'provenance': [{'wikipedia_id': '1328582', 'title': 'Hong Kong Housing Authority', 'start_paragraph_id': 1, 'start_character': 112, 'end_paragraph_id': 1, 'end_character': 116, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1328582', 'title': 'Hong Kong Housing Authority', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 394, 'bleu_score': 0.9338603241255111, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18284190277045418489}, 'section': 'Section::::Abstract.'}]}]