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_75 ( gross_tonnage INTEGER, ship VARCHAR, material VARCHAR, date_commissioned VARCHAR )

### Question ###
Name the sum of gross tonnage for wood on date more tahn 1846 for comissioned and ship of esk

### Accurate SQL ###

SELECT SUM(gross_tonnage) FROM table_name_75 WHERE material = "wood" AND date_commissioned > 1846 AND ship = "esk"