Context: CREATE TABLE table_2850912_7 (nhl_team VARCHAR, college_junior_club_team VARCHAR)
Question: How many nhl teams are listed when college/junior/club team is listed as newton north high school (ushs-ma)?
Answer: SELECT COUNT(nhl_team) FROM table_2850912_7 WHERE college_junior_club_team = "Newton North High School (USHS-MA)"