What is the amount of snow where the sunshine is 1 633, and storms are lower than 29?
CREATE TABLE "comparison_of_meteorological_data_at_for" (
  "sunshine_hrs_year" text,
  "rain_mm_year" text,
  "snow_days_year" real,
  "storms_days_year" real,
  "fog_days_year" real
);
SELECT AVG("snow_days_year") FROM "comparison_of_meteorological_data_at_for" WHERE "sunshine_hrs_year"='1 633' AND "storms_days_year"<29;