Which game in the Dragon Age series sold the most copies?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'INTERNAL', 'name_': 'Q769833', 'id': 0, 'label': 'Dragon Age: Origins – Awakening'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q1766436', 'id': 1, 'label': 'Dragon Age'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q735926', 'id': 2, 'label': 'Dragon Age: Origins'}], 'links': [{'name_': 'P179', 'source': 0, 'target': 1, 'label': 'part of the series'}, {'name_': 'P8646', 'source': 0, 'target': 2, 'label': 'expansion of'}]}