How many values of free float for the BSE code of 4EH?
CREATE TABLE "composition" (
  "bse_code" text,
  "company" text,
  "city" text,
  "gics_sector" text,
  "free_float" text,
  "index_weighting_pct" text
);
SELECT COUNT("free_float") FROM "composition" WHERE "bse_code"='4EH';