Name the number of advocate #1 that aired on april 2, 2008
CREATE TABLE "season_1_2008" (
  "num" real,
  "advocate_num_1" text,
  "advocate_num_2" text,
  "root_of_all_evil" text,
  "poll_winner" text,
  "original_air_date" text
);
SELECT COUNT("advocate_num_1") FROM "season_1_2008" WHERE "original_air_date"='April 2, 2008';