Question: which country made the ball for world cup 2018
[{'answer': 'Pakistan', 'provenance': [{'wikipedia_id': '55756692', 'title': 'Adidas Telstar 18', 'start_paragraph_id': 1, 'start_character': 169, 'end_paragraph_id': 1, 'end_character': 177, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]