Question: how did american tv host ed sullivan first learn about the beatles
[{'answer': 'passing through Heathrow', 'provenance': [{'wikipedia_id': '140616', 'title': 'The Ed Sullivan Show', 'start_paragraph_id': 43, 'start_character': 61, 'end_paragraph_id': 43, 'end_character': 85, 'bleu_score': 1.0, 'section': 'Section::::Famous performances/notable guest stars.:The Beatles.\n'}]}, {'provenance': [{'wikipedia_id': '140616', 'title': 'The Ed Sullivan Show', 'start_paragraph_id': 43, 'start_character': 0, 'end_paragraph_id': 43, 'end_character': 661, 'bleu_score': 0.9605459459520521, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1630779562630860692}, 'section': 'Section::::Famous performances/notable guest stars.:The Beatles.\n'}]}]