user: Question: What is the total of the first elected year of the incumbent from the washington 8 district?
Columns: ['District', 'Incumbent', 'Party', 'First elected', 'Results']
Types: ['text', 'text', 'text', 'real', 'text']
Sample row: ['Washington 1', 'Jay Inslee', 'Democratic', 1998.0, 'Re-elected']
SQL:

assistant: SELECT SUM("First elected") FROM "Table" WHERE "District" = 'washington 8';