Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_18176 ( "District" text, "Incumbent" text, "Party" text, "First elected" real, "Result" text, "Candidates" text )

### Question ###
What's the first elected year of the district who's been the last one to do so?

### Accurate SQL ###

SELECT MAX("First elected") FROM table_18176