What is the height for the Tianjin members in 2008?
CREATE TABLE "volleyball_at_the_2008_summer_olympics_w" (
  "name" text,
  "height" text,
  "weight" text,
  "spike" text,
  "2008_club" text
);
SELECT "height" FROM "volleyball_at_the_2008_summer_olympics_w" WHERE "2008_club"='tianjin';