CREATE TABLE table_name_89 (userpics_free VARCHAR(255), monthly_cost_for_paid_account VARCHAR(255), s_registered_user VARCHAR(255))
What is Userpics Free, when Monthly Cost For Paid Account is "unknown", and when S Registered User is 2340?
    
SQL: SELECT userpics_free FROM table_name_89 WHERE monthly_cost_for_paid_account = "unknown" AND s_registered_user = "2340"