How many titles are there for the original air date April 3, 2012?
CREATE TABLE "table1_26150013_1" (
  "no_in_series" text,
  "no_in_season" text,
  "title" text,
  "animation_directors" text,
  "written_by" text,
  "original_air_date" text
);
SELECT COUNT("title") FROM "table1_26150013_1" WHERE "original_air_date"='April 3, 2012';