Question: how many seasons of silicon valley are there
[{'answer': '5', 'provenance': [{'wikipedia_id': '41577351', 'title': 'Silicon Valley (TV series)', 'start_paragraph_id': 1, 'start_character': 285, 'end_paragraph_id': 1, 'end_character': 286, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]