Which operator runs the Mamariga shuttle line?
CREATE TABLE table_20511 (
    "Line" text,
    "Terminals" text,
    "Status" text,
    "Length" text,
    "Total number of stations" real,
    "Operator" text
)
SELECT "Operator" FROM table_20511 WHERE "Line" = 'Mamariga Shuttle'
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: Which operator runs the Mamariga shuttle line? ### Input: CREATE TABLE table_20511 (
    "Line" text,
    "Terminals" text,
    "Status" text,
    "Length" text,
    "Total number of stations" real,
    "Operator" text
) ### Response: SELECT "Operator" FROM table_20511 WHERE "Line" = 'Mamariga Shuttle'