Question: who is the director of nightmare before christmas
[{'answer': 'Henry Selick', 'provenance': [{'wikipedia_id': '403227', 'title': 'The Nightmare Before Christmas', 'start_paragraph_id': 1, 'start_character': 179, 'end_paragraph_id': 1, 'end_character': 191, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '403227', 'title': 'The Nightmare Before Christmas', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 602, 'bleu_score': 0.8258017770421711, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7873079266106730798}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '403227', 'title': 'The Nightmare Before Christmas', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['The Nightmare Before Christmas (also known as Tim Burton\'s The Nightmare Before Christmas) is a 1993 American stop-motion animated musical dark fantasy Halloween film directed by Henry Selick, and produced and conceived by Tim Burton. It tells the story of Jack Skellington, the King of "Halloween Town" who stumbles through a portal to "Christmas Town" and decides to celebrate the holiday. Danny Elfman wrote the songs and score, and provided the singing voice of Jack. The principal voice cast also includes Chris Sarandon, Catherine O\'Hara, William Hickey, Ken Page, Paul Reubens, Glenn Shadix, and Ed Ivory.', 'The Nightmare Before Christmas (also known as Tim Burton\'s The Nightmare Before Christmas) is a 1993 American stop-motion animated musical dark fantasy Halloween film directed by Henry Selick, and produced and conceived by Tim Burton. It tells the story of Jack Skellington, the King of "Halloween Town" who stumbles through a portal to "Christmas Town" and decides to celebrate the holiday. Danny Elfman wrote the songs and score, and provided the singing voice of Jack. The principal voice cast also includes Chris Sarandon, Catherine O\'Hara, William Hickey, Ken Page, Paul Reubens, Glenn Shadix, and Ed Ivory.']}}]}, {'provenance': [{'wikipedia_id': '403227', 'title': 'The Nightmare Before Christmas', 'section': 'Section::::Production.:Filming.\n', 'start_paragraph_id': 28, 'end_paragraph_id': 28, 'meta': {'evidence_span': ['On the direction of the film, Selick reflected, "It\'s as though he [Burton] laid the egg, and I sat on it and hatched it. He wasn\'t involved in a hands-on way, but his hand is in it. It was my job to make it look like \'a Tim Burton film\', which is not so different from my own films." When asked on Burton\'s involvement, Selick claimed, "I don\'t want to take away from Tim, but he was not in San Francisco when we made it. He came up five times over two years, and spent no more than eight or ten days in total." Walt Disney Feature Animation contributed with some use of second-layering traditional animation. Burton found production somewhat difficult because he was directing "Batman Returns" and in pre-production of "Ed Wood".', 'om Tim, but he was not in San Francisco when we made it. He came up five times over two years, and spent']}}]}, {'provenance': [{'wikipedia_id': '403227', 'title': 'The Nightmare Before Christmas', 'section': 'Section::::Production.:Filming.\n', 'start_paragraph_id': 27, 'end_paragraph_id': 27, 'meta': {'evidence_span': ['Selick and his team of animators began production in July 1991 in San Francisco, California with a crew of over 120 workers, utilizing 20 sound stages for filming. Joe Ranft was hired from Disney as a storyboard supervisor, while Eric Leighton was hired to supervise animation. At the peak of production, 20 individual stages were simultaneously being used for filming. In total, there were 109,440 frames taken for the film. The work of Ray Harryhausen, Ladislas Starevich, Edward Gorey, Étienne Delessert, Gahan Wilson, Charles Addams, Jan Lenica, Francis Bacon, and Wassily Kandinsky influenced the filmmakers.', 'Selick and his team of animators began production in July 1991 in San Francisco, California with a crew of over 120 workers, utilizing 20 sound stages for filming. Joe Ranft was hired from Disney as a storyboard supervisor, while Eric Leighton was hired to supervise animation. At the peak of production, 20 individual stages were simultaneously being used for filming. In total, there were 109,440 frames taken for the film. The work of Ray Harryhausen, Ladislas Starevich, Edward Gorey, Étienne Delessert, Gahan Wilson, Charles Addams, Jan Lenica, Francis Bacon, and Wassily Kandinsky influenced the filmmakers. Selick described the production design as akin to a pop-up book. In addition, Selick stated, "When we reach Halloween Town, it\'s entirely German Expressionism. When Jack enters Christmas Town, it\'s an outrageous Dr. Seuss-esque setpiece. Finally, when Jack is delivering presents in the \'Real World\', everything is plain, simple and perfectly aligned." Vincent Price, Don Ameche, and James Earl Jones were considered to provide the narration for the film\'s prologue; however, all proved difficult to cast, and the producers instead hired local voice artist, Ed Ivory. Patrick Stewart provided the prologue narration for the film\'s soundtrack. On the direction of the film, Selick reflected, "It\'s as though he [Burton] laid the egg,']}}]}]