Which Field has a Discovery of na, and an Operator(s) of woc, and a Geological Trend of western
CREATE TABLE table_name_15 (
    field VARCHAR,
    geological_trend VARCHAR,
    discovery VARCHAR,
    operator_s_ VARCHAR
)
SELECT field FROM table_name_15 WHERE discovery = "na" AND operator_s_ = "woc" AND geological_trend = "western"
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 Field has a Discovery of na, and an Operator(s) of woc, and a Geological Trend of western ### Input: CREATE TABLE table_name_15 (
    field VARCHAR,
    geological_trend VARCHAR,
    discovery VARCHAR,
    operator_s_ VARCHAR
) ### Response: SELECT field FROM table_name_15 WHERE discovery = "na" AND operator_s_ = "woc" AND geological_trend = "western"