When was the build date for ff20 PRR class and erie built builder's model?
CREATE TABLE table_name_14 (build_date VARCHAR, prr_class VARCHAR, builder’s_model VARCHAR)
SELECT build_date FROM table_name_14 WHERE prr_class = "ff20" AND builder’s_model = "erie built"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_14 (build_date VARCHAR, prr_class VARCHAR, builder’s_model VARCHAR) Question: When was the build date for ff20 PRR class and erie built builder's model? [/INST] SELECT build_date FROM table_name_14 WHERE prr_class = "ff20" AND builder’s_model = "erie built" </s>