How many nhl teams are listed when college/junior/club team is listed as newton north high school (ushs-ma)?
CREATE TABLE "round_seven" (
  "pick_num" real,
  "player" text,
  "position" text,
  "nationality" text,
  "nhl_team" text,
  "college_junior_club_team" text
);
SELECT COUNT("nhl_team") FROM "round_seven" WHERE "college_junior_club_team"='Newton North High School (USHS-MA)';