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: Show writers who have published a book with price more than 4000000. | publication : publication_id , book_id , publisher , publication_date , price | book : book_id , title , issues , writer | publication.book_id = book.book_id | 

### Response:

select _ from _ where _ | select book.writer from book join publication on book.book_id = publication.book_id where publication.price > 4000000