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 | Incumbent | Party | First elected | Result | Candidates |
| --- | --- | --- | --- | --- | --- |
| Louisiana 1 | Joachim O. Fernandez | Democratic | 1930.0 | Re-elected | Joachim O. Fernandez (D) Unopposed |
| Louisiana 2 | Paul H. Maloney | Democratic | 1930.0 | Re-elected | Paul H. Maloney (D) Unopposed |
| Louisiana 3 | Robert L. Mouton | Democratic | 1936.0 | Re-elected | Robert L. Mouton (D) Unopposed |
| Louisiana 4 | Overton Brooks | Democratic | 1936.0 | Re-elected | Overton Brooks (D) 99.6% Ben Neal (I) 0.4% |
| Louisiana 5 | Newt V. Mills | Democratic | 1936.0 | Re-elected | Newt V. Mills (D) Unopposed |
| Louisiana 6 | John K. Griffith | Democratic | 1936.0 | Re-elected | John K. Griffith (D) Unopposed |
| Louisiana 7 | René L. De Rouen | Democratic | 1927.0 | Re-elected | René L. De Rouen (D) Unopposed |
Question:
What district is incumbent robert l. mouton from?
Answer:
Louisiana 3