Question: who were the two superpowers during the cold war space race
[{'answer': 'the United States', 'provenance': [{'wikipedia_id': '84237', 'title': 'Space Race', 'start_paragraph_id': 1, 'start_character': 111, 'end_paragraph_id': 1, 'end_character': 128, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'the Soviet Union ( USSR )'}, {'provenance': [{'wikipedia_id': '84237', 'title': 'Space Race', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 671, 'bleu_score': 0.6899958235761731, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3893864607945488460}, 'section': 'Section::::Abstract.'}]}]