Name the number of candidates for samuel d. ingham
CREATE TABLE table_2668347_17 (
    candidates VARCHAR,
    incumbent VARCHAR
)
SELECT COUNT(candidates) FROM table_2668347_17 WHERE incumbent = "Samuel D. Ingham"
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: Name the number of candidates for samuel d. ingham ### Input: CREATE TABLE table_2668347_17 (
    candidates VARCHAR,
    incumbent VARCHAR
) ### Response: SELECT COUNT(candidates) FROM table_2668347_17 WHERE incumbent = "Samuel D. Ingham"