CREATE TABLE table_47185 ("Name" TEXT, "Year Began" TEXT, "s Registered user" TEXT, "Updated in past 30 days" TEXT, "Registration" TEXT, "Ability to syndicate off-site feeds" TEXT, "Userpics Free" TEXT, "Userpics Paid" TEXT, "Monthly Cost for Paid Account" TEXT, "Yearly Cost for Paid Account" TEXT, "Permanent Account" TEXT)

What is Userpics Free, when Monthly Cost For Paid Account is 'unknown', and when S Registered User is 2340?
SELECT "Userpics Free" FROM table_47185 WHERE "Monthly Cost for Paid Account" = 'unknown' AND "s Registered user" = '2340'
SELECT "Userpics Free" FROM "table_47185" WHERE "Monthly Cost for Paid Account" = 'unknown' AND "s Registered user" = '2340'