Table schema:
CREATE TABLE table_name_89 (userpics_free VARCHAR, monthly_cost_for_paid_account VARCHAR, s_registered_user VARCHAR)

Question: 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"