What is the field stability of Cyanogen Bromide that has an effectiveness of 9?
CREATE TABLE table_56013 (
    "Agent" text,
    "Melting / boiling point" text,
    "Effectiveness as blood agent" real,
    "Persistence, open area" real,
    "Persistence, enclosed area" real,
    "Field stability" real,
    "Storage stability" real,
    "Toxicity as blood agent" real
)
SELECT COUNT("Field stability") FROM table_56013 WHERE "Agent" = 'cyanogen bromide' AND "Effectiveness as blood agent" > '9'
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 field stability of Cyanogen Bromide that has an effectiveness of 9? ### Input: CREATE TABLE table_56013 (
    "Agent" text,
    "Melting / boiling point" text,
    "Effectiveness as blood agent" real,
    "Persistence, open area" real,
    "Persistence, enclosed area" real,
    "Field stability" real,
    "Storage stability" real,
    "Toxicity as blood agent" real
) ### Response: SELECT COUNT("Field stability") FROM table_56013 WHERE "Agent" = 'cyanogen bromide' AND "Effectiveness as blood agent" > '9'