What percentage of people were opposed to the candidate based on the WNBC/Marist poll that showed 8% of people were unsure?
CREATE TABLE table_75640 (
    "Poll Source" text,
    "Date" text,
    "Candidate" text,
    "Support" text,
    "Consider" text,
    "Oppose" text,
    "Unsure" text
)
SELECT "Oppose" FROM table_75640 WHERE "Unsure" = '8%' AND "Poll Source" = 'wnbc/marist poll'
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: What percentage of people were opposed to the candidate based on the WNBC/Marist poll that showed 8% of people were unsure? ### Input: CREATE TABLE table_75640 (
    "Poll Source" text,
    "Date" text,
    "Candidate" text,
    "Support" text,
    "Consider" text,
    "Oppose" text,
    "Unsure" text
) ### Response: SELECT "Oppose" FROM table_75640 WHERE "Unsure" = '8%' AND "Poll Source" = 'wnbc/marist poll'