What is the average ANSI code for the town of Sherman and the smaller of the water area in square miles than 0.005?
CREATE TABLE "s" (
  "township" text,
  "county" text,
  "pop_2010" real,
  "land_sqmi" real,
  "water_sqmi" real,
  "latitude" real,
  "longitude" real,
  "geo_id" real,
  "ansi_code" real
);
SELECT AVG("ansi_code") FROM "s" WHERE "township"='sherman' AND "water_sqmi"<0.005;