How many years entered service when there were 13 locomotives?
CREATE TABLE table_name_89 (entered_service VARCHAR, locomotive VARCHAR)
SELECT COUNT(entered_service) FROM table_name_89 WHERE locomotive = "13"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_89 (entered_service VARCHAR, locomotive VARCHAR) Question: How many years entered service when there were 13 locomotives? [/INST] SELECT COUNT(entered_service) FROM table_name_89 WHERE locomotive = "13" </s>