what's the first elected with district illinois 18
CREATE TABLE table_18187 (
    "District" text,
    "Incumbent" text,
    "Party" text,
    "First elected" text,
    "Result" text,
    "Candidates" text
)
SELECT "First elected" FROM table_18187 WHERE "District" = 'Illinois 18'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: what's the first elected with district illinois 18 ### Input: CREATE TABLE table_18187 (
    "District" text,
    "Incumbent" text,
    "Party" text,
    "First elected" text,
    "Result" text,
    "Candidates" text
) ### Response: SELECT "First elected" FROM table_18187 WHERE "District" = 'Illinois 18'