Question: which soviet-controlled countries made up the iron curtain
[{'answer': 'The German Democratic Republic', 'provenance': [{'wikipedia_id': '18953051', 'title': 'Iron Curtain', 'start_paragraph_id': 51, 'start_character': 12, 'end_paragraph_id': 51, 'end_character': 42, 'bleu_score': 1.0, 'section': 'Section::::During the Cold War.:Political, economic and military realities.:Eastern Bloc.\n'}]}, {'answer': "The Hungarian People 's Republic", 'provenance': [{'wikipedia_id': '18953051', 'title': 'Iron Curtain', 'start_paragraph_id': 54, 'start_character': 12, 'end_paragraph_id': 54, 'end_character': 43, 'bleu_score': 1.0, 'section': 'Section::::During the Cold War.:Political, economic and military realities.:Eastern Bloc.\n'}]}, {'answer': 'The Czechoslovak Socialist Republic', 'provenance': [{'wikipedia_id': '18953051', 'title': 'Iron Curtain', 'start_paragraph_id': 55, 'start_character': 12, 'end_paragraph_id': 55, 'end_character': 47, 'bleu_score': 1.0, 'section': 'Section::::During the Cold War.:Political, economic and military realities.:Eastern Bloc.\n'}]}, {'answer': "The People 's Socialist Republic of Albania"}, {'answer': "The People 's Republic of Poland"}, {'answer': "The People 's Republic of Romania"}, {'answer': "The People 's Republic of Bulgaria"}]