What is the Year of the Player with a Weight of 230 or less from San Antonio, Texas?
CREATE TABLE "roster" (
  "name" text,
  "position" text,
  "height" text,
  "weight" real,
  "year" text,
  "home_town" text
);
SELECT "year" FROM "roster" WHERE "weight"<230 AND "home_town"='san antonio, texas';