Question: how many sets of pokemon cards are there
[{'answer': '68 in Japan', 'provenance': [{'wikipedia_id': '5454085', 'title': 'List of Pokémon Trading Card Game sets', 'start_paragraph_id': 1, 'start_character': 185, 'end_paragraph_id': 1, 'end_character': 196, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': '74 card sets released in America'}, {'provenance': [{'wikipedia_id': '5454085', 'title': 'List of Pokémon Trading Card Game sets', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 196, 'bleu_score': 0.8815741981066071, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12598676561431357783}, 'section': 'Section::::Abstract.'}]}]