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"
### Context: CREATE TABLE table_21821014_1 (installation_date VARCHAR, location VARCHAR) ### Question: What was the installation date in El Paso, Texas?  ### Answer: SELECT installation_date FROM table_21821014_1 WHERE location = "El Paso, Texas"