Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_50 (season VARCHAR, acquisition_via VARCHAR, number VARCHAR)

### Question ###
What is the Season with an Acquisition via of rookie draft, and the number is 15?

### Accurate SQL ###

SELECT season FROM table_name_50 WHERE acquisition_via = "rookie draft" AND number = "15"