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 |
| --- | --- | --- | --- | --- |
| Illinois 1 | Elihu B. Washburne | Republican | 1852.0 | Re-elected |
| Illinois 2 | John F. Farnsworth | Republican | 1856.0 | Retired Republican Hold |
| Illinois 3 | Owen Lovejoy | Republican | 1856.0 | Re-elected |
| Illinois 4 | William Kellogg | Republican | 1856.0 | Re-elected |
| Illinois 5 | Isaac N. Morris | Democratic | 1856.0 | Retired Democratic Hold |
| Illinois 6 | John A. McClernand | Democratic | 1859.0 | Re-elected |
| Illinois 7 | James C. Robinson | Democratic | 1858.0 | Re-elected |
| Illinois 8 | Philip B. Fouke | Democratic | 1858.0 | Re-elected |
| Illinois 9 | John A. Logan | Democratic | 1858.0 | Re-elected |
Question:
Which District has a First elected of 1856, and an Incumbent of william kellogg?
Answer:
Illinois 4