what model was dated before model s-18 / vdr-3 ?
CREATE TABLE table_203_823 (
    id number,
    "model name" text,
    "date" text,
    "type" text,
    "thrust (kg) / power (eshp)" text,
    "fitted to" text
)
SELECT "model name" FROM table_203_823 WHERE "date" < (SELECT "date" FROM table_203_823 WHERE "model name" = 's-18/vdr-3')
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 model was dated before model s-18 / vdr-3 ? ### Input: CREATE TABLE table_203_823 (
    id number,
    "model name" text,
    "date" text,
    "type" text,
    "thrust (kg) / power (eshp)" text,
    "fitted to" text
) ### Response: SELECT "model name" FROM table_203_823 WHERE "date" < (SELECT "date" FROM table_203_823 WHERE "model name" = 's-18/vdr-3')