Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.

### Instruction:

Convert text to sql: Who is the oldest person whose job is student? | person : name , age , city , gender , job | personfriend : name , friend , year | personfriend.friend = person.name | personfriend.name = person.name | 

### Response:

select _ from _ where _ = ( select max ( _ ) from _ where _ ) | select name from person where job = 'student' and age = ( select max ( age ) from person where job = 'student' )