Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_5 (accession_number VARCHAR, common_name VARCHAR)
### Question:
What is the accession number of the protein with the common name Purple Sea Urchin?
### Answer:
SELECT accession_number FROM table_name_5 WHERE common_name = "purple sea urchin"