Question: where is britain's got talent live shows held
[{'answer': 'Elstree Studios', 'provenance': [{'wikipedia_id': '8517686', 'title': "Britain's Got Talent", 'start_paragraph_id': 20, 'start_character': 494, 'end_paragraph_id': 20, 'end_character': 509, 'bleu_score': 1.0, 'section': 'Section::::Format.:Semi-finals and Final.\n'}]}]