SELECT name ,  country FROM people WHERE age  <  (SELECT avg(age) FROM people)
Show the name and country for all people whose age is smaller than the average.
[Schema (values) (types)]: | wedding |  people : people_id (text) , name (number) , country (text) , is_male (text) , age (text) | church : church_id (text) , name (number) , organized_by (text) , open_date (text) , continuation_of (text) | wedding : church_id (text) , male_id (number) , female_id (text) , year (text);