List the names of the customers who have once bought product 'food'.
CREATE TABLE order_items (
    product_id VARCHAR,
    order_id VARCHAR
)

CREATE TABLE orders (
    customer_id VARCHAR,
    order_id VARCHAR
)

CREATE TABLE products (
    product_name VARCHAR,
    product_id VARCHAR
)

CREATE TABLE customers (
    customer_name VARCHAR,
    customer_id VARCHAR
)
SELECT T1.customer_name FROM customers AS T1 JOIN orders AS T2 JOIN order_items AS T3 JOIN products AS T4 ON T1.customer_id = T2.customer_id AND T2.order_id = T3.order_id AND T3.product_id = T4.product_id WHERE T4.product_name = "food" GROUP BY T1.customer_id HAVING COUNT(*) >= 1
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: List the names of the customers who have once bought product 'food'. ### Input: CREATE TABLE order_items (
    product_id VARCHAR,
    order_id VARCHAR
)

CREATE TABLE orders (
    customer_id VARCHAR,
    order_id VARCHAR
)

CREATE TABLE products (
    product_name VARCHAR,
    product_id VARCHAR
)

CREATE TABLE customers (
    customer_name VARCHAR,
    customer_id VARCHAR
) ### Response: SELECT T1.customer_name FROM customers AS T1 JOIN orders AS T2 JOIN order_items AS T3 JOIN products AS T4 ON T1.customer_id = T2.customer_id AND T2.order_id = T3.order_id AND T3.product_id = T4.product_id WHERE T4.product_name = "food" GROUP BY T1.customer_id HAVING COUNT(*) >= 1