Question: which year did brazil organize its first world cup
[{'answer': '1950', 'provenance': [{'wikipedia_id': '4723188', 'title': 'History of the FIFA World Cup', 'start_paragraph_id': 18, 'start_character': 15, 'end_paragraph_id': 18, 'end_character': 19, 'bleu_score': 1.0, 'section': 'Section::::Post-war years.\n'}]}]