List all number of yards with an AST of 8.
CREATE TABLE "table1_13237088_28" (
  "name" text,
  "gp" real,
  "solo" real,
  "ast" real,
  "total" real,
  "tfl_yds" text,
  "no_yds" text,
  "br_up" real,
  "qbh" real,
  "no_yds" text,
  "avg" text,
  "td" real,
  "long" real,
  "rcv_yds" text,
  "ff" real,
  "blkd_kick" real
);
SELECT "no_yds" FROM "table1_13237088_28" WHERE "ast"=8;