Question: when did they start to build the sagrada familia
[{'answer': '1882', 'provenance': [{'wikipedia_id': '59545', 'title': 'Sagrada Família', 'start_paragraph_id': 2, 'start_character': 3, 'end_paragraph_id': 2, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '59545', 'title': 'Sagrada Família', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 452, 'bleu_score': 0.760275234328974, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12760555280639198682}, 'section': 'Section::::Abstract.'}]}]