Question: when did the first build a bear open
[{'answer': '1997', 'provenance': [{'wikipedia_id': '3095699', 'title': 'Build-A-Bear Workshop', 'start_paragraph_id': 1, 'start_character': 598, 'end_paragraph_id': 1, 'end_character': 602, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]