human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Date, Ship, Type, Nationality, Tonnage GRT
###Question: what is the total tonnage grt of the cargo ship(s) sunk or captured on 4 feb 16?
gpt
SELECT COUNT Tonnage GRT FROM table WHERE Type = cargo ship AND Date = 4 feb 16