how many quarries opened before 1892 ?
CREATE TABLE table_203_2 (
    id number,
    "name" text,
    "mineral" text,
    "opened" text,
    "closed" text,
    "years connected" text,
    "notes" text
)
SELECT COUNT(*) FROM table_203_2 WHERE "opened" <= 1892
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: how many quarries opened before 1892 ? ### Input: CREATE TABLE table_203_2 (
    id number,
    "name" text,
    "mineral" text,
    "opened" text,
    "closed" text,
    "years connected" text,
    "notes" text
) ### Response: SELECT COUNT(*) FROM table_203_2 WHERE "opened" <= 1892