How many groups of candidates are there in there in the district where the incumbent is Doc Hastings?
CREATE TABLE table_16185956_1 (
    incumbent VARCHAR
)
SELECT COUNT(2008 AS _candidates) FROM table_16185956_1 WHERE incumbent = "Doc Hastings"
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: How many groups of candidates are there in there in the district where the incumbent is Doc Hastings? ### Input: CREATE TABLE table_16185956_1 (
    incumbent VARCHAR
) ### Response: SELECT COUNT(2008 AS _candidates) FROM table_16185956_1 WHERE incumbent = "Doc Hastings"