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_28 ( moving_from VARCHAR, transfer_window VARCHAR, country VARCHAR )

### Question ###
Who is moving during winter from wal?

### Accurate SQL ###

SELECT moving_from FROM table_name_28 WHERE transfer_window = "winter" AND country = "wal"