Question: when did they start building the louvre pyramid
[{'answer': '1984', 'provenance': [{'wikipedia_id': '3305865', 'title': 'Louvre Pyramid', 'start_paragraph_id': 3, 'start_character': 65, 'end_paragraph_id': 3, 'end_character': 69, 'bleu_score': 1.0, 'section': 'Section::::Design and construction.\n'}]}]