Question: how many teams are there in vivo ipl
[{'answer': '8', 'provenance': [{'wikipedia_id': '13260340', 'title': 'Indian Premier League', 'start_paragraph_id': 1, 'start_character': 279, 'end_paragraph_id': 1, 'end_character': 280, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]