How many goals did the player from England who played the position of mf and had 170 club apps had?
CREATE TABLE "key" (
  "nationality" text,
  "position" text,
  "tottenham_hotspur_career" text,
  "club_apps" text,
  "goals" text
);
SELECT "goals" FROM "key" WHERE "nationality"='england' AND "position"='mf' AND "club_apps"='170';