How many Gold medals did Puerto Rico receive with 1 Silver and a Total of 1 or less?
CREATE TABLE "medal_table" (
  "rank" real,
  "nation" text,
  "gold" real,
  "silver" real,
  "bronze" real,
  "total" real
);
SELECT COUNT("gold") FROM "medal_table" WHERE "silver"=1 AND "nation"='puerto rico' AND "total"<1;