CREATE TABLE "1_yuan" (
  "year" real,
  "denomination" text,
  "alloy" text,
  "reverse" text,
  "diameter" text,
  "weight" text,
  "obverse" text,
  "mintage" real,
  "series" text
);

Question: what's the series with reverse being swimming
SQL: SELECT "series" FROM "1_yuan" WHERE "reverse"='Swimming';

Question: what's the alloy with series being ii series
SQL: SELECT "alloy" FROM "1_yuan" WHERE "series"='II series';

Question: what's the denomination with year being 2008 and reverse being football
SQL: SELECT "denomination" FROM "1_yuan" WHERE "year"=2008 AND "reverse"='Football';

Question:  how many reverse with series being iii series
SQL: SELECT COUNT("reverse") FROM "1_yuan" WHERE "series"='III series';