Which year has a railway class of 250?
CREATE TABLE table_name_19 (year VARCHAR, class VARCHAR)
SELECT year FROM table_name_19 WHERE class = "250"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_19 (year VARCHAR, class VARCHAR) Question: Which year has a railway class of 250? [/INST] SELECT year FROM table_name_19 WHERE class = "250" </s>