Question: how many teams qualify for wc from south america
[{'answer': '10', 'provenance': [{'wikipedia_id': '45195256', 'title': '2018 FIFA World Cup qualification (CONMEBOL)', 'start_paragraph_id': 5, 'start_character': 272, 'end_paragraph_id': 5, 'end_character': 274, 'bleu_score': 1.0, 'section': 'Section::::Format.\n'}]}]