Question: how many does the hydro in glasgow hold
[{'answer': '13,000', 'provenance': [{'wikipedia_id': '9063580', 'title': 'SSE Hydro', 'start_paragraph_id': 4, 'start_character': 184, 'end_paragraph_id': 4, 'end_character': 190, 'bleu_score': 1.0, 'section': 'Section::::Background.\n'}]}]