Question: how many seasons of shameless usa is there
[{'answer': '8', 'provenance': [{'wikipedia_id': '29108688', 'title': 'Shameless (American TV series)', 'start_paragraph_id': 2, 'start_character': 57, 'end_paragraph_id': 2, 'end_character': 58, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]