SELECT AVG(Milliseconds) FROM GENRE AS T1 JOIN TRACK AS T2 ON T1.GenreId  =  T2.GenreId WHERE T1.Name  =  "Latin" OR T1.Name  =  "Pop"
Find the average millisecond length of Latin and Pop tracks.
SELECT AVG ( Milliseconds ) FROM GENRE AS T1 JOIN TRACK AS T2 ON T1.GenreId = T2.GenreId WHERE T1.Name = `` Latin '' OR T1.Name = `` Pop ''
select avg ( milliseconds ) from genre as t1 join track as t2 on t1 . genreid = t2 . genreid where t1 . name = value or t1 . name = value
Find the average millisecond length of Latin and Pop tracks .