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_29418619_1 (year VARCHAR, _number VARCHAR)

### Question ###
What year is the player whose number is 31?

### Accurate SQL ###

SELECT year FROM table_29418619_1 WHERE _number = 31