Write SQL query to solve given problem: When did the project "Photojournalists Want to Exhibit Their Best Works" go live?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T1.date_posted FROM projects AS T1 INNER JOIN essays AS T2 ON T1.projectid = T2.projectid WHERE T2.title LIKE 'Photojournalists Want to Exhibit Their Best Works'