What was the installation date in El Paso, Texas? 
CREATE TABLE table_21821014_1 (installation_date VARCHAR, location VARCHAR)
SELECT installation_date FROM table_21821014_1 WHERE location = "El Paso, Texas"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_21821014_1 (installation_date VARCHAR, location VARCHAR) Question: What was the installation date in El Paso, Texas?  [/INST] SELECT installation_date FROM table_21821014_1 WHERE location = "El Paso, Texas" </s>