Where did the book winner of the Pulitzer Prize 2020 graduate from?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q13371', 'id': 0, 'label': 'Harvard University'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q46525', 'id': 1, 'label': 'Pulitzer Prize'}, {'type': 'INTERNAL', 'name_': 'Q313246', 'id': 2, 'label': 'David Foster Wallace'}], 'links': [{'name_': 'P69', 'source': 2, 'target': 0, 'label': 'educated at'}, {'name_': 'P1411', 'source': 2, 'target': 1, 'label': 'nominated for'}]}