Question: when did the angel of the north go up
[{'answer': '1998', 'provenance': [{'wikipedia_id': '358435', 'title': 'Angel of the North', 'start_paragraph_id': 2, 'start_character': 13, 'end_paragraph_id': 2, 'end_character': 17, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]