Question: how many seasons of avengers assemble are there
[{'answer': 'fifth season'}, {'provenance': [{'wikipedia_id': '39476718', 'title': 'List of Avengers Assemble episodes', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 309, 'bleu_score': 0.931245760303767, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6668836170425543115}, 'section': 'Section::::Abstract.'}]}]