Question: where did the beatles first perform in the united states
[{'answer': 'on The Ed Sullivan Show', 'provenance': [{'wikipedia_id': '844475', 'title': 'Beatlemania', 'start_paragraph_id': 2, 'start_character': 85, 'end_paragraph_id': 2, 'end_character': 106, 'bleu_score': 0.668740304976422, 'section': 'Section::::Abstract.'}]}]