Who was in charge of the screenplay on the movie that was based on the third book of Lord of the Rings?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'INTERNAL', 'name_': 'Q1860', 'id': 0, 'label': 'English'}, {'type': 'INTERNAL', 'name_': 'Q3414212', 'id': 1, 'label': 'Hugo Award for Best Dramatic Presentation'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q15228', 'id': 2, 'label': 'The Lord of the Rings'}, {'type': 'INTERNAL', 'name_': 'Q892', 'id': 3, 'label': 'J. R. R. Tolkien'}, {'type': 'INTERNAL', 'name_': 'Q127367', 'id': 4, 'label': 'The Lord of the Rings: The Fellowship of the Ring'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q116854', 'id': 5, 'label': 'Philippa Boyens'}], 'links': [{'name_': 'P1346', 'source': 1, 'target': 3, 'label': 'winner'}, {'name_': 'P1346', 'source': 1, 'target': 5, 'label': 'winner'}, {'name_': 'P407', 'source': 2, 'target': 0, 'label': 'language of work or name'}, {'name_': 'P50', 'source': 2, 'target': 3, 'label': 'author'}, {'name_': 'P103', 'source': 3, 'target': 0, 'label': 'native language'}, {'name_': 'P166', 'source': 3, 'target': 1, 'label': 'award received'}, {'name_': 'P800', 'source': 3, 'target': 2, 'label': 'notable work'}, {'name_': 'P364', 'source': 4, 'target': 0, 'label': 'original language of performance work'}, {'name_': 'P166', 'source': 4, 'target': 1, 'label': 'award received'}, {'name_': 'P1877', 'source': 4, 'target': 3, 'label': 'after a work by'}, {'name_': 'P58', 'source': 4, 'target': 5, 'label': 'screenwriter'}]}