What is the average plaxo that has a myspace greater than 64, a bebo greater than 3, with 4 as the friendster?
CREATE TABLE "overlap_between_multiple_social_network_" (
  "site" text,
  "bebo" real,
  "facebook" real,
  "friendster" real,
  "linked_in" real,
  "my_space" real,
  "ning" real,
  "orkut" real,
  "plaxo" real
);
SELECT AVG("plaxo") FROM "overlap_between_multiple_social_network_" WHERE "my_space">64 AND "bebo">3 AND "friendster"=4;