SELECT AVG(height__cm_) FROM table_name_66 WHERE weight__kg_ < 91 AND position = "d" AND birthdate = "july 4, 1975"
Berapa tinggi rata -rata ketika beratnya kurang dari 91 dan posisinya D, dan tanggal lahir 4 Juli 1975?
CREATE TABLE table_name_66 (height__cm_ INTEGER, birthdate VARCHAR, weight__kg_ VARCHAR, position VARCHAR)