What is the height above sea level for the station opened 175.67km from Wellington prior to 1887?
CREATE TABLE "stations" (
  "station" text,
  "distance_from_wellington" text,
  "height_above_sea_level_m" text,
  "opened" real,
  "closed" text
);
SELECT "height_above_sea_level_m" FROM "stations" WHERE "opened"<1887 AND "distance_from_wellington"='175.67km';