who is the the incumbent with candidates being ben cravens (d) unopposed
CREATE TABLE table_18667 (
    "District" text,
    "Incumbent" text,
    "Party" text,
    "First elected" real,
    "Result" text,
    "Candidates" text
)
SELECT "Incumbent" FROM table_18667 WHERE "Candidates" = 'Ben Cravens (D) Unopposed'
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: who is the the incumbent with candidates being ben cravens (d) unopposed ### Input: CREATE TABLE table_18667 (
    "District" text,
    "Incumbent" text,
    "Party" text,
    "First elected" real,
    "Result" text,
    "Candidates" text
) ### Response: SELECT "Incumbent" FROM table_18667 WHERE "Candidates" = 'Ben Cravens (D) Unopposed'