Tell me the sum of number of jamaicans given british citizenship for 2004 and registration of a minor child more than 640
CREATE TABLE "population_and_distribution" (
  "year" real,
  "numer_of_jamaicans_granted_british_citizenship" real,
  "naturalisation_by_residence" real,
  "naturalisation_by_marriage" real,
  "registration_of_a_minor_child" real,
  "registration_by_other_means" real
);
SELECT SUM("numer_of_jamaicans_granted_british_citizenship") FROM "population_and_distribution" WHERE "year"=2004 AND "registration_of_a_minor_child">640;