Question: who is the largest cable provider in the us
[{'answer': 'Comcast', 'provenance': [{'wikipedia_id': '2181454', 'title': 'List of multiple-system operators', 'start_paragraph_id': 1, 'start_character': 650, 'end_paragraph_id': 1, 'end_character': 657, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]