Table schema:
CREATE TABLE table_name_27 (height INTEGER, position VARCHAR, year_born__age_ VARCHAR)

Question: Count the average Height which has a Position of pf, and a Year born (Age) on april 1, 1981 (age32)?
SQL: SELECT AVG(height) FROM table_name_27 WHERE position = "pf" AND year_born__age_ = "april 1, 1981 (age32)"