List the smallest possible spoilt vote with the s r-tr ndelag constituency.
CREATE TABLE table_17864 (
    "Constituency" text,
    "Electorate" real,
    "s Spoilt vote" real,
    "Total poll (%)" text,
    "For (%)" text,
    "Against (%)" text
)
SELECT MIN("s Spoilt vote") FROM table_17864 WHERE "Constituency" = 'Sør-Trøndelag'
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: List the smallest possible spoilt vote with the s r-tr ndelag constituency. ### Input: CREATE TABLE table_17864 (
    "Constituency" text,
    "Electorate" real,
    "s Spoilt vote" real,
    "Total poll (%)" text,
    "For (%)" text,
    "Against (%)" text
) ### Response: SELECT MIN("s Spoilt vote") FROM table_17864 WHERE "Constituency" = 'Sør-Trøndelag'