what is the difference in the tonage between the queen mary and media ?
CREATE TABLE table_203_547 (
    id number,
    "ship" text,
    "built" number,
    "in service for cunard" text,
    "type" text,
    "tonnage" text,
    "notes" text
)
SELECT (SELECT "tonnage" FROM table_203_547 WHERE "ship" = 'queen mary') - (SELECT "tonnage" FROM table_203_547 WHERE "ship" = 'media')
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 difference in the tonage between the queen mary and media ? ### Input: CREATE TABLE table_203_547 (
    id number,
    "ship" text,
    "built" number,
    "in service for cunard" text,
    "type" text,
    "tonnage" text,
    "notes" text
) ### Response: SELECT (SELECT "tonnage" FROM table_203_547 WHERE "ship" = 'queen mary') - (SELECT "tonnage" FROM table_203_547 WHERE "ship" = 'media')