Question: how many seasons are there of the americans
[{'answer': '6', 'provenance': [{'wikipedia_id': '37490729', 'title': 'The Americans', 'start_paragraph_id': 1, 'start_character': 626, 'end_paragraph_id': 1, 'end_character': 627, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]