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:
| District | Vacator | Reason for change | Successor | Date successor seated |
| --- | --- | --- | --- | --- |
| Louisiana 1st | Richard A. Tonry (D) | Forced to resign May 4, 1977 | Bob Livingston (R) | August 27, 1977 |
| New York 21st | Robert García (R-L) | Changed parties February 21, 1978 | Robert García (D) | February 21, 1978 |
| Tennessee 5th | Clifford Allen (D) | Died June 18, 1978 | Vacant | Not filled this term |
| California 18th | William M. Ketchum (R) | Died June 24, 1978 | Vacant | Not filled this term |
| Illinois 1st | Ralph Metcalfe (D) | Died October 10, 1978 | Vacant | Not filled this term |
| Maryland 6th | Goodloe Byron (D) | Died October 11, 1978 | Vacant | Not filled this term |
| Wisconsin 6th | William A. Steiger (R) | Died December 4, 1978 | Vacant | Not filled this term |
| Wyoming At-large | Teno Roncalio (D) | Resigned December 30, 1978 | Vacant | Not filled this term |
| California 3rd | John E. Moss (D) | Resigned December 31, 1978 | Vacant | Not filled this term |
| California 14th | John J. McFall (D) | Resigned December 31, 1978 | Vacant | Not filled this term |
| California 33rd | Del M. Clawson (R) | Resigned December 31, 1978 | Vacant | Not filled this term |
| Kansas 5th | Joe Skubitz (R) | Resigned December 31, 1978 | Vacant | Not filled this term |
| Michigan 10th | Elford A. Cederberg (R) | Resigned December 31, 1978 | Vacant | Not filled this term |
| New Jersey 14th | Joseph A. LeFante (D) | Resigned December 31, 1978 | Vacant | Not filled this term |
| New York 9th | James Delaney (D) | Resigned December 31, 1978 | Vacant | Not filled this term |
| Texas 6th | Olin E. Teague (D) | Resigned December 31, 1978 | Vacant | Not filled this term |
| Texas 11th | William R. Poage (D) | Resigned December 31, 1978 | Vacant | Not filled this term |
Question:
What is the name of the vacator for district Louisiana 1st?
Answer:
Richard A. Tonry (D)