Which Enrollment has a Primary Conference of mid-hoosier, and a County of 16 decatur, and an IHSAA Class of aa?
CREATE TABLE "resources" (
  "school" text,
  "location" text,
  "mascot" text,
  "enrollment" real,
  "ihsaa_class" text,
  "county" text,
  "primary_conference" text
);
SELECT "enrollment" FROM "resources" WHERE "primary_conference"='mid-hoosier' AND "county"='16 decatur' AND "ihsaa_class"='aa';