How many bills where originally cosponsored in those years where the total of all amendments cosponsored was 0?
CREATE TABLE table_18852984_2 (
    bills_originally_cosponsored VARCHAR,
    all_amendments_cosponsored VARCHAR
)
SELECT bills_originally_cosponsored FROM table_18852984_2 WHERE all_amendments_cosponsored = 0
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 bills where originally cosponsored in those years where the total of all amendments cosponsored was 0? ### Input: CREATE TABLE table_18852984_2 (
    bills_originally_cosponsored VARCHAR,
    all_amendments_cosponsored VARCHAR
) ### Response: SELECT bills_originally_cosponsored FROM table_18852984_2 WHERE all_amendments_cosponsored = 0