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_4056 ( "Executed person" text, "Date of execution" text, "Place of execution" text, "Crime" text, "Method" text, "Under President" text )

### Question ###
for what crime was gunther volz executed at metz?

### Accurate SQL ###

SELECT "Crime" FROM table_4056 WHERE "Place of execution" = 'Metz' AND "Executed person" = 'Gunther Volz'