Which type had the unit greifswald - 7 (kgr 7) ?
CREATE TABLE table_15561 (
    "Unit" text,
    "Type" text,
    "Net Power" text,
    "Total Power" text,
    "Finish construction" text
)
SELECT "Type" FROM table_15561 WHERE "Unit" = 'greifswald - 7 (kgr 7)'
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 type had the unit greifswald - 7 (kgr 7) ? ### Input: CREATE TABLE table_15561 (
    "Unit" text,
    "Type" text,
    "Net Power" text,
    "Total Power" text,
    "Finish construction" text
) ### Response: SELECT "Type" FROM table_15561 WHERE "Unit" = 'greifswald - 7 (kgr 7)'