query: SELECT AVG(T2.UnitPrice) FROM GENRE AS T1 JOIN TRACK AS T2 ON T1.GenreId  =  T2.GenreId WHERE T1.Name  =  "Rock"
question: What-what that average unit price rocks tracks?
query_toks: SELECT AVG ( T2.UnitPrice ) FROM GENRE AS T1 JOIN TRACK AS T2 ON T1.GenreId = T2.GenreId WHERE T1.Name = `` Rock ''
query_toks_no_value: select avg ( t2 . unitprice ) from genre as t1 join track as t2 on t1 . genreid = t2 . genreid where t1 . name = value
question_toks: What-what that average unit price rocks tracks?