Where did Brian Hightower play when he has the Conv of 0?
CREATE TABLE "most_tries_in_a_match" (
  "player" text,
  "tries" text,
  "conv" text,
  "venue" text,
  "date" text
);
SELECT "venue" FROM "most_tries_in_a_match" WHERE "conv"='0' AND "player"='brian hightower';