How many episodes have a segment d that is goalie masks (part 2)?
CREATE TABLE "season_8_2006_2007" (
  "series_ep" text,
  "episode" real,
  "netflix" text,
  "segment_a" text,
  "segment_b" text,
  "segment_c" text,
  "segment_d" text
);
SELECT COUNT("episode") FROM "season_8_2006_2007" WHERE "segment_d"='goalie masks (part 2)';