Question: which 2 countries were able to participate in the cash and carry program
[{'answer': 'United States', 'provenance': [{'wikipedia_id': '13912377', 'title': 'Cash and carry (World War II)', 'start_paragraph_id': 1, 'start_character': 98, 'end_paragraph_id': 1, 'end_character': 111, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Britain'}]