Count the number of actors.
CREATE TABLE actor (
    actor_id number,
    name text,
    musical_id number,
    character text,
    duration text,
    age number
)

CREATE TABLE musical (
    musical_id number,
    name text,
    year number,
    award text,
    category text,
    nominee text,
    result text
)
SELECT COUNT(*) FROM actor
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: Count the number of actors. ### Input: CREATE TABLE actor (
    actor_id number,
    name text,
    musical_id number,
    character text,
    duration text,
    age number
)

CREATE TABLE musical (
    musical_id number,
    name text,
    year number,
    award text,
    category text,
    nominee text,
    result text
) ### Response: SELECT COUNT(*) FROM actor