Question: how many teams in football world cup 2018
[{'answer': '32', 'provenance': [{'wikipedia_id': '29856514', 'title': '2018 FIFA World Cup qualification', 'start_paragraph_id': 1, 'start_character': 135, 'end_paragraph_id': 1, 'end_character': 137, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '29856514', 'title': '2018 FIFA World Cup qualification', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 612, 'bleu_score': 0.688246974394892, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4447860036051018118}, 'section': 'Section::::Abstract.'}]}]