CREATE TABLE "proportions" (
  "benchmark" text,
  "crown_height" text,
  "pavilion_depth" text,
  "table_diameter" text,
  "girdle_thickness" text,
  "crown_angle" text,
  "pavilion_angle" text,
  "brilliance_grade" text
);

Question: Which Pavilion depth has a Crown angle of 34.0–34.7°?
SQL: SELECT "pavilion_depth" FROM "proportions" WHERE "crown_angle"='34.0–34.7°';

Question: Which Brilliance Grade has a Benchmark of practical fine cut?
SQL: SELECT "brilliance_grade" FROM "proportions" WHERE "benchmark"='practical fine cut';

Question: Which Table diameter has a Crown height of 14.45%?
SQL: SELECT "table_diameter" FROM "proportions" WHERE "crown_height"='14.45%';

Question: Which Brilliance Grade has a Crown angle of 41.1°?
SQL: SELECT "brilliance_grade" FROM "proportions" WHERE "crown_angle"='41.1°';

Question: Which Pavilion depth has a Brilliance Grade of 100% and a Pavilion angle of n/a?
SQL: SELECT "pavilion_depth" FROM "proportions" WHERE "brilliance_grade"='100%' AND "pavilion_angle"='n/a';