Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Number | Serial Title | Year | Chapters | Genre | Director | Cast |
| --- | --- | --- | --- | --- | --- | --- |
| 1.0 | Jungle Menace | 1937.0 | 15.0 | Jungle | Harry L. Fraser and George Melford | Frank Buck |
| 2.0 | The Mysterious Pilot | 1937.0 | 15.0 | Aviation | Spencer Gordon Bennet | Frank Hawks |
| 3.0 | The Secret of Treasure Island | 1938.0 | 15.0 | Maritime | Elmer Clifton | Don Terry |
| 4.0 | The Great Adventures of Wild Bill Hickok | 1938.0 | 15.0 | Western | Mack V. Wright and Sam Nelson | Gordon Elliott |
| 5.0 | The Spider's Web | 1938.0 | 15.0 | Superhero | Ray Taylor and James W. Horne | Warren Hull |
| 6.0 | Flying G-Men | 1939.0 | 15.0 | Aviation | Ray Taylor and James W. Horne | Robert Paige |
| 7.0 | Mandrake the Magician | 1939.0 | 12.0 | Action Fantasy | Sam Nelson and Norman Deming | Warren Hull |
| 8.0 | Overland with Kit Carson | 1939.0 | 15.0 | Western | Sam Nelson and Norman Deming | Bill Elliott |
| 9.0 | The Shadow | 1940.0 | 15.0 | Superhero Mystery | James W. Horne | Victor Jory |
| 10.0 | Terry and the Pirates | 1940.0 | 15.0 | Jungle | James W. Horne | William Tracy |
| 11.0 | Deadwood Dick | 1940.0 | 15.0 | Western | James W. Horne | Don Douglas |
| 12.0 | The Green Archer | 1940.0 | 15.0 | Mystery | James W. Horne | Victor Jory |
| 13.0 | White Eagle | 1941.0 | 15.0 | Western | James W. Horne | Buck Jones |
| 14.0 | The Spider Returns | 1941.0 | 15.0 | Superhero | James W. Horne | Warren Hull |
| 15.0 | The Iron Claw | 1941.0 | 15.0 | Mystery | James W. Horne | Charles Quigley |
| 16.0 | Holt of the Secret Service | 1941.0 | 15.0 | Crime drama | James W. Horne | Jack Holt |
| 17.0 | Captain Midnight | 1942.0 | 15.0 | Aviation | James W. Horne | Dave O'Brien |
| 18.0 | Perils of the Royal Mounted | 1942.0 | 15.0 | Northern | James W. Horne | Robert Stevens |
| 19.0 | The Secret Code | 1942.0 | 15.0 | Crime drama | Spencer Gordon Bennet | Paul Kelly |
| 20.0 | The Valley of Vanishing Men | 1942.0 | 15.0 | Western | Spencer Gordon Bennet | Bill Elliott |
| 21.0 | Batman | 1943.0 | 15.0 | Superhero | Lambert Hillyer | Lewis Wilson Douglas Croft |
| 22.0 | The Phantom | 1943.0 | 15.0 | Superhero , Jungle | B. Reeves Eason | Tom Tyler |
| 23.0 | The Desert Hawk | 1944.0 | 15.0 | Adventure | B. Reeves Eason | Gilbert Roland |
| 24.0 | Black Arrow | 1944.0 | 15.0 | Western | Lew Landers and (uncredited) B. Reeves Eason | Robert Scott |
| 25.0 | Brenda Starr, Reporter | 1945.0 | 13.0 | Crime drama | Wallace Fox | Joan Woodbury |
| 26.0 | The Monster and the Ape | 1945.0 | 15.0 | Science fiction | Howard Bretherton | Robert Lowery |
| 27.0 | Jungle Raiders | 1945.0 | 15.0 | Jungle | Lesley Selander | Kane Richmond |
| 28.0 | Who's Guilty? | 1945.0 | 15.0 | Mystery | Howard Bretherton and Wallace Grissell | Robert Kent |
| 29.0 | Hop Harrigan | 1946.0 | 15.0 | Aviation | Derwin Abrahams | William Bakewell |
| 30.0 | Chick Carter, Detective | 1946.0 | 15.0 | Crime drama | Derwin Abrahams | Lyle Talbot |
| 31.0 | Son of the Guardsman | 1946.0 | 15.0 | Medieval | Derwin Abrahams | Robert Shaw |
| 32.0 | Jack Armstrong | 1947.0 | 15.0 | Science fiction | Wallace Fox | John Hart |
| 33.0 | The Vigilante | 1947.0 | 15.0 | Western | Wallace Fox | Ralph Byrd |
| 34.0 | The Sea Hound | 1947.0 | 15.0 | Maritime | Walter B. Eason and Mack V. Wright | Buster Crabbe |
| 35.0 | Brick Bradford | 1947.0 | 15.0 | Science fiction | Spencer Gordon Bennet and Thomas Carr | Kane Richmond |
| 36.0 | Tex Granger | 1948.0 | 15.0 | Western | Derwin Abrahams | Robert Kellard |
| 37.0 | Superman | 1948.0 | 15.0 | Superhero | Spencer Gordon Bennet and Thomas Carr | Kirk Alyn Noel Neill |
| 38.0 | Congo Bill | 1948.0 | 15.0 | Jungle | Spencer Gordon Bennet and Thomas Carr | Don McGuire Cleo Moore |
| 39.0 | Bruce Gentry | 1949.0 | 15.0 | Science fiction | Spencer Gordon Bennet and Thomas Carr | Tom Neal |
| 40.0 | Batman and Robin | 1949.0 | 15.0 | Superhero | Spencer Gordon Bennet | Robert Lowery Johnny Duncan |
| 41.0 | Adventures of Sir Galahad | 1949.0 | 15.0 | Medieval | Spencer Gordon Bennet | George Reeves |
| 42.0 | Cody of the Pony Express | 1950.0 | 15.0 | Western | Spencer Gordon Bennet | Jock O' Mahoney |
| 43.0 | Atom Man vs. Superman | 1950.0 | 15.0 | Superhero | Spencer Gordon Bennet | Kirk Alyn Lyle Talbot |
| 44.0 | Pirates of the High Seas | 1950.0 | 15.0 | Maritime | Spencer Gordon Bennet and Thomas Carr | Buster Crabbe |
| 45.0 | Roar of the Iron Horse | 1951.0 | 15.0 | Western | Spencer Gordon Bennet and Thomas Carr | Jock O' Mahoney |
| 46.0 | Mysterious Island | 1951.0 | 15.0 | Science fiction | Spencer Gordon Bennet | Richard Crane |
| 47.0 | Captain Video: Master of the Stratosphere | 1951.0 | 15.0 | Science fiction | Spencer Gordon Bennet | Judd Holdren |
| 48.0 | King of the Congo | 1952.0 | 15.0 | Jungle | Spencer Gordon Bennet | Buster Crabbe |
| 49.0 | Blackhawk | 1952.0 | 15.0 | Aviation | Spencer Gordon Bennet | Kirk Alyn |
| 50.0 | Son of Geronimo | 1952.0 | 15.0 | Western | Spencer Gordon Bennet | Clay Moore |
| 51.0 | The Lost Planet | 1953.0 | 15.0 | Science fiction | Spencer Gordon Bennet | Judd Holdren |
| 52.0 | The Great Adventures of Captain Kidd | 1953.0 | 15.0 | Maritime | Derwin Abrahams and Charles S. Gould | Richard Crane |
| 53.0 | Gunfighters of the Northwest | 1954.0 | 15.0 | Western | Spencer Gordon Bennet | Jack Mahoney |
| 54.0 | Riding with Buffalo Bill | 1954.0 | 15.0 | Western | Spencer Gordon Bennet | Marshall Reed |
| 55.0 | The Adventures of Captain Africa | 1955.0 | 15.0 | Superhero , Jungle | Spencer Gordon Bennet | John Hart |
| 56.0 | Perils of the Wilderness | 1956.0 | 15.0 | Western | Spencer Gordon Bennet | Dennis Moore |
| 57.0 | Blazing the Overland Trail | 1956.0 | 15.0 | Western | Spencer Gordon Bennet | Dennis Moore |
Question:
How many chapters did Elmer Clifton direct?
Answer:
1.0