How many Tries against have a Team of dinamo bucureşti, and Tries for smaller than 19?
CREATE TABLE "pool_3" (
  "team" text,
  "tries_for" real,
  "tries_against" real,
  "try_diff" text,
  "points_for" real,
  "points_against" real,
  "points_diff" text
);
SELECT COUNT("tries_against") FROM "pool_3" WHERE "team"='dinamo bucureşti' AND "tries_for"<19;