Question: how many seasons are there on the fosters
[{'answer': 'five', 'provenance': [{'wikipedia_id': '38795806', 'title': 'The Fosters (American TV series)', 'start_paragraph_id': 3, 'start_character': 75, 'end_paragraph_id': 3, 'end_character': 79, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]