How many Zelda games came out before The Legend of Zelda: A Link to the Past?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'QUESTIONS_ENTITY', 'name_': 'Q12393', 'id': 0, 'label': 'The Legend of Zelda'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q370055', 'id': 1, 'label': 'The Legend of Zelda: A Link to the Past'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q187339', 'id': 2, 'label': 'Zelda II: The Adventure of Link'}, {'type': 'INTERNAL', 'name_': 'Q113181469', 'id': 3, 'label': 'Stalfos'}], 'links': [{'name_': 'P179', 'source': 2, 'target': 0, 'label': 'part of the series'}, {'name_': 'P1441', 'source': 3, 'target': 1, 'label': 'present in work'}, {'name_': 'P1441', 'source': 3, 'target': 2, 'label': 'present in work'}]}