List from which date and to which date these staff work: project staff of the project which hires the most staffs
CREATE TABLE Project_Staff (
    date_from VARCHAR,
    date_to VARCHAR,
    project_id VARCHAR,
    role_code VARCHAR
)
SELECT date_from, date_to FROM Project_Staff WHERE project_id IN (SELECT project_id FROM Project_Staff GROUP BY project_id ORDER BY COUNT(*) DESC LIMIT 1) UNION SELECT date_from, date_to FROM Project_Staff WHERE role_code = 'leader'
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 from which date and to which date these staff work: project staff of the project which hires the most staffs ### Input: CREATE TABLE Project_Staff (
    date_from VARCHAR,
    date_to VARCHAR,
    project_id VARCHAR,
    role_code VARCHAR
) ### Response: SELECT date_from, date_to FROM Project_Staff WHERE project_id IN (SELECT project_id FROM Project_Staff GROUP BY project_id ORDER BY COUNT(*) DESC LIMIT 1) UNION SELECT date_from, date_to FROM Project_Staff WHERE role_code = 'leader'