How many people won the 1956 Nobel Prize in Physics?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'QUESTIONS_ENTITY', 'name_': 'Q38104', 'id': 0, 'label': 'Nobel Prize in Physics'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q57092', 'id': 1, 'label': 'Johannes Stark'}], 'links': [{'name_': 'P166', 'source': 1, 'target': 0, 'label': 'award received'}]}