What is Updated In Past 30 Days, when Registration is "Open to people 13 and over"?
CREATE TABLE "general_information_feature_comparison" (
  "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
);
SELECT "updated_in_past_30_days" FROM "general_information_feature_comparison" WHERE "registration"='open to people 13 and over';