How many candidates represent the district of kenneth a. roberts?
CREATE TABLE table_1341897_3 (
    candidates VARCHAR,
    incumbent VARCHAR
)
SELECT COUNT(candidates) FROM table_1341897_3 WHERE incumbent = "Kenneth A. Roberts"
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 candidates represent the district of kenneth a. roberts? ### Input: CREATE TABLE table_1341897_3 (
    candidates VARCHAR,
    incumbent VARCHAR
) ### Response: SELECT COUNT(candidates) FROM table_1341897_3 WHERE incumbent = "Kenneth A. Roberts"