Which game in the Silent Hill series sold the most copies?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'INTERNAL', 'name_': 'Q30', 'id': 0, 'label': 'United States of America'}, {'type': 'INTERNAL', 'name_': 'Q208850', 'id': 1, 'label': 'single-player video game'}, {'type': 'INTERNAL', 'name_': 'Q1462437', 'id': 2, 'label': "James Cameron's Avatar: The Game"}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q8079', 'id': 3, 'label': 'Wii'}, {'type': 'INTERNAL', 'name_': 'Q54330', 'id': 4, 'label': 'Super Star Wars: The Empire Strikes Back'}, {'type': 'INTERNAL', 'name_': 'Q3960498', 'id': 5, 'label': 'Silent Hill'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q236821', 'id': 6, 'label': 'Silent Hill'}, {'type': 'INTERNAL', 'name_': 'Q3283277', 'id': 7, 'label': 'Silent Hill: Orphan'}], 'links': [{'name_': 'P17', 'source': 0, 'target': 0, 'label': 'country'}, {'name_': 'P404', 'source': 2, 'target': 1, 'label': 'game mode'}, {'name_': 'P400', 'source': 2, 'target': 3, 'label': 'platform'}, {'name_': 'P495', 'source': 4, 'target': 0, 'label': 'country of origin'}, {'name_': 'P404', 'source': 4, 'target': 1, 'label': 'game mode'}, {'name_': 'P400', 'source': 4, 'target': 3, 'label': 'platform'}, {'name_': 'P17', 'source': 5, 'target': 0, 'label': 'country'}, {'name_': 'P1441', 'source': 5, 'target': 6, 'label': 'present in work'}, {'name_': 'P404', 'source': 7, 'target': 1, 'label': 'game mode'}, {'name_': 'P179', 'source': 7, 'target': 6, 'label': 'part of the series'}]}