What is the average body weight of Asian patients?
average = AVG(observations.VALUE WHERE observations.DESCRIPTION = 'Body Weight' AND observations.UNITS = 'kg'); body weight refers to observations.DESCRIPTION = 'Body Weight'; Asian refers to race = 'asian';
SELECT SUM(T2.VALUE) / COUNT(T1.patient) FROM patients AS T1 INNER JOIN observations AS T2 ON T1.patient = T2.PATIENT WHERE T1.race = 'asian' AND T2.DESCRIPTION = 'Body Weight' AND T2.UNITS = 'kg'