Question: how many epl titles has manchester united won
[{'answer': '20', 'provenance': [{'wikipedia_id': '19961', 'title': 'Manchester United F.C.', 'start_paragraph_id': 2, 'start_character': 96, 'end_paragraph_id': 2, 'end_character': 98, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '19961', 'title': 'Manchester United F.C.', 'start_paragraph_id': 50, 'start_character': 0, 'end_paragraph_id': 50, 'end_character': 324, 'bleu_score': 0.9645876452711911, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4835844803732562388}, 'section': 'Section::::Support.:Rivalries.\n'}]}]