What is the sum number of year when Call of Duty 4: Modern Warfare was the game?
CREATE TABLE table_name_55 (year VARCHAR, game VARCHAR)
SELECT COUNT(year) FROM table_name_55 WHERE game = "call of duty 4: modern warfare"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_55 (year VARCHAR, game VARCHAR) Question: What is the sum number of year when Call of Duty 4: Modern Warfare was the game? [/INST] SELECT COUNT(year) FROM table_name_55 WHERE game = "call of duty 4: modern warfare" </s>