What is the weight for Iraklis in 2008?
CREATE TABLE "volleyball_at_the_2008_summer_olympics_m" (
  "name" text,
  "height" text,
  "weight" text,
  "spike" text,
  "2008_club" text
);
SELECT "weight" FROM "volleyball_at_the_2008_summer_olympics_m" WHERE "2008_club"='iraklis';