What is the smallest electorate for the Conservative party in South West Devon constituency, with over 2 conservatives and a name of Plymstock Radford?
CREATE TABLE table_66596 (
    "Name" text,
    "Labour" real,
    "Conservative" real,
    "Political party" text,
    "Electorate" real,
    "Constituency" text
)
SELECT MIN("Electorate") FROM table_66596 WHERE "Political party" = 'conservative' AND "Constituency" = 'south west devon' AND "Conservative" > '2' AND "Name" = 'plymstock radford'
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 is the smallest electorate for the Conservative party in South West Devon constituency, with over 2 conservatives and a name of Plymstock Radford? ### Input: CREATE TABLE table_66596 (
    "Name" text,
    "Labour" real,
    "Conservative" real,
    "Political party" text,
    "Electorate" real,
    "Constituency" text
) ### Response: SELECT MIN("Electorate") FROM table_66596 WHERE "Political party" = 'conservative' AND "Constituency" = 'south west devon' AND "Conservative" > '2' AND "Name" = 'plymstock radford'