Find the names of the chip models that are not used by any phone with full accreditation type.
CREATE TABLE phone (
    model_name VARCHAR,
    chip_model VARCHAR,
    Accreditation_type VARCHAR
)

CREATE TABLE chip_model (
    model_name VARCHAR,
    chip_model VARCHAR,
    Accreditation_type VARCHAR
)
SELECT model_name FROM chip_model EXCEPT SELECT chip_model FROM phone WHERE Accreditation_type = 'Full'
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: Find the names of the chip models that are not used by any phone with full accreditation type. ### Input: CREATE TABLE phone (
    model_name VARCHAR,
    chip_model VARCHAR,
    Accreditation_type VARCHAR
)

CREATE TABLE chip_model (
    model_name VARCHAR,
    chip_model VARCHAR,
    Accreditation_type VARCHAR
) ### Response: SELECT model_name FROM chip_model EXCEPT SELECT chip_model FROM phone WHERE Accreditation_type = 'Full'