How many sets of marks does Tonioli get in week 3?
CREATE TABLE "table1_18595004_7" (
  "week_num" real,
  "dance_song" text,
  "inaba" real,
  "goodman" real,
  "tonioli" real,
  "result" text
);
SELECT COUNT("tonioli") FROM "table1_18595004_7" WHERE "week_num"=3;