CREATE TABLE singer 
(singer _ id,TEXT not null,
 primary key ,
 nation  TEXT not null,
 sname   TEXT null,
dname    TEXT null,
 cname    TEXT null,
 age , INTEGER  not null,
 year  INTEGER not null,
 birth _ year INTEGER null,
salary REAL null,
 city TEXT   null ,
 phone _ number INTEGER null,
 tax REAL  null 
)


-- External Knowledge : age = year - birth _ year ;
-- Using valid SQLite and understading External Knowledge , answer the following questions for the tables provided above .
--How many singers are over 27 years old？
 The final SQL is : Let ' s think step by step . Give two different versions of responses. Please separate the responses with 6 asterisk symbols: ******.
user