On what date was Stauffer Chemical Company (Lemoyne Plant), which was listed on 09/21/1984, deleted?
CREATE TABLE table_55865 (
    "CERCLIS ID" text,
    "Name" text,
    "County" text,
    "Proposed" text,
    "Listed" text,
    "Construction completed" text,
    "Partially deleted" text,
    "Deleted" text
)
SELECT "Deleted" FROM table_55865 WHERE "Listed" = '09/21/1984' AND "Name" = 'stauffer chemical company (lemoyne plant)'
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: On what date was Stauffer Chemical Company (Lemoyne Plant), which was listed on 09/21/1984, deleted? ### Input: CREATE TABLE table_55865 (
    "CERCLIS ID" text,
    "Name" text,
    "County" text,
    "Proposed" text,
    "Listed" text,
    "Construction completed" text,
    "Partially deleted" text,
    "Deleted" text
) ### Response: SELECT "Deleted" FROM table_55865 WHERE "Listed" = '09/21/1984' AND "Name" = 'stauffer chemical company (lemoyne plant)'