What is the structure of the document with the least number of accesses?
CREATE TABLE document_structures (
    document_structure_code text,
    parent_document_structure_code text,
    document_structure_description text
)

CREATE TABLE document_sections (
    section_id number,
    document_code text,
    section_sequence number,
    section_code text,
    section_title text
)

CREATE TABLE images (
    image_id number,
    image_alt_text text,
    image_name text,
    image_url text
)

CREATE TABLE documents (
    document_code text,
    document_structure_code text,
    document_type_code text,
    access_count number,
    document_name text
)

CREATE TABLE users (
    user_id number,
    role_code text,
    user_name text,
    user_login text,
    password text
)

CREATE TABLE document_sections_images (
    section_id number,
    image_id number
)

CREATE TABLE document_functional_areas (
    document_code text,
    functional_area_code text
)

CREATE TABLE roles (
    role_code text,
    role_description text
)

CREATE TABLE functional_areas (
    functional_area_code text,
    parent_functional_area_code text,
    functional_area_description text
)
SELECT t2.document_structure_description FROM documents AS t1 JOIN document_structures AS t2 ON t1.document_structure_code = t2.document_structure_code GROUP BY t1.document_structure_code ORDER BY COUNT(*) DESC LIMIT 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: What is the structure of the document with the least number of accesses? ### Input: CREATE TABLE document_structures (
    document_structure_code text,
    parent_document_structure_code text,
    document_structure_description text
)

CREATE TABLE document_sections (
    section_id number,
    document_code text,
    section_sequence number,
    section_code text,
    section_title text
)

CREATE TABLE images (
    image_id number,
    image_alt_text text,
    image_name text,
    image_url text
)

CREATE TABLE documents (
    document_code text,
    document_structure_code text,
    document_type_code text,
    access_count number,
    document_name text
)

CREATE TABLE users (
    user_id number,
    role_code text,
    user_name text,
    user_login text,
    password text
)

CREATE TABLE document_sections_images (
    section_id number,
    image_id number
)

CREATE TABLE document_functional_areas (
    document_code text,
    functional_area_code text
)

CREATE TABLE roles (
    role_code text,
    role_description text
)

CREATE TABLE functional_areas (
    functional_area_code text,
    parent_functional_area_code text,
    functional_area_description text
) ### Response: SELECT t2.document_structure_description FROM documents AS t1 JOIN document_structures AS t2 ON t1.document_structure_code = t2.document_structure_code GROUP BY t1.document_structure_code ORDER BY COUNT(*) DESC LIMIT 1