Question: how many teams in the english premier league
[{'answer': '20', 'provenance': [{'wikipedia_id': '11250', 'title': 'Premier League', 'start_paragraph_id': 1, 'start_character': 160, 'end_paragraph_id': 1, 'end_character': 162, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]