how many number of 1 acts were there ?
CREATE TABLE table_203_501 (
    id number,
    "title" text,
    "genre" text,
    "sub\u00addivisions" text,
    "libretto" text,
    "premiere date" text,
    "place, theatre" text
)
SELECT COUNT(*) FROM table_203_501 WHERE "sub\u00addivisions" = '1 act'
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 number of 1 acts were there ? ### Input: CREATE TABLE table_203_501 (
    id number,
    "title" text,
    "genre" text,
    "sub\u00addivisions" text,
    "libretto" text,
    "premiere date" text,
    "place, theatre" text
) ### Response: SELECT COUNT(*) FROM table_203_501 WHERE "sub\u00addivisions" = '1 act'