Name the slope length for gondola
CREATE TABLE table_21935 (
    "Name or route" text,
    "type" text,
    "elevation groundstation" real,
    "elevation mountainstation" real,
    "slope length" real,
    "capacity in persons/hour" real,
    "construction year(s)" text
)
SELECT MIN("slope length") FROM table_21935 WHERE "type" = 'gondola'
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: Name the slope length for gondola ### Input: CREATE TABLE table_21935 (
    "Name or route" text,
    "type" text,
    "elevation groundstation" real,
    "elevation mountainstation" real,
    "slope length" real,
    "capacity in persons/hour" real,
    "construction year(s)" text
) ### Response: SELECT MIN("slope length") FROM table_21935 WHERE "type" = 'gondola'