List all candidates in the democratic party where the election had the incumbent Frank Chelf running.
CREATE TABLE table_72404 (
    "District" text,
    "Incumbent" text,
    "Party" text,
    "First elected" text,
    "Result" text,
    "Candidates" text
)
SELECT "Candidates" FROM table_72404 WHERE "Party" = 'Democratic' AND "Incumbent" = 'Frank Chelf'
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: List all candidates in the democratic party where the election had the incumbent Frank Chelf running. ### Input: CREATE TABLE table_72404 (
    "District" text,
    "Incumbent" text,
    "Party" text,
    "First elected" text,
    "Result" text,
    "Candidates" text
) ### Response: SELECT "Candidates" FROM table_72404 WHERE "Party" = 'Democratic' AND "Incumbent" = 'Frank Chelf'