what is the maximum completed for delta bessborough
CREATE TABLE table_18073 (
    "Rank" real,
    "Building" text,
    "Address" text,
    "Height" text,
    "Storeys" real,
    "Completed" real
)
SELECT MAX("Completed") FROM table_18073 WHERE "Building" = 'Delta Bessborough'
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 maximum completed for delta bessborough ### Input: CREATE TABLE table_18073 (
    "Rank" real,
    "Building" text,
    "Address" text,
    "Height" text,
    "Storeys" real,
    "Completed" real
) ### Response: SELECT MAX("Completed") FROM table_18073 WHERE "Building" = 'Delta Bessborough'