CREATE TABLE "grey_district" (
  "name" text,
  "years" text,
  "area" text,
  "authority" text,
  "decile" text,
  "roll" text
);

Question: With what Name does the Roll of 637 belong?
SQL: SELECT "name" FROM "grey_district" WHERE "roll"='637';

Question: Which is the Authority that has a Roll of 70?
SQL: SELECT "authority" FROM "grey_district" WHERE "roll"='70';

Question: The Decile of 6 has which corresponding Years?
SQL: SELECT "years" FROM "grey_district" WHERE "decile"='6';