Which of Beyoncé's albums has sold the most copies worldwide, I Am... Sasha Fierce or Lemonade?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q67311526', 'id': 0, 'label': 'Obalky knih.cz'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q36153', 'id': 1, 'label': 'Beyoncé'}, {'type': 'INTERNAL', 'name_': 'Q238235', 'id': 2, 'label': '4'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q147006', 'id': 3, 'label': 'I Am… Sasha Fierce'}, {'type': 'INTERNAL', 'name_': 'Q24192467', 'id': 4, 'label': '6 Inch'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q23905116', 'id': 5, 'label': 'Lemonade'}], 'links': [{'name_': 'P1343', 'source': 1, 'target': 0, 'label': 'described by source'}, {'name_': 'P175', 'source': 2, 'target': 1, 'label': 'performer'}, {'name_': 'P155', 'source': 2, 'target': 3, 'label': 'follows'}, {'name_': 'P175', 'source': 4, 'target': 1, 'label': 'performer'}, {'name_': 'P361', 'source': 4, 'target': 5, 'label': 'part of'}]}