Which Sub-Parish has a church built in 1866?
CREATE TABLE "churches_in_vik" (
  "parish_prestegjeld" text,
  "sub_parish_sokn" text,
  "church_name" text,
  "year_built" text,
  "location_of_the_church" text
);
SELECT "sub_parish_sokn" FROM "churches_in_vik" WHERE "year_built"='1866';