What year did the team from City of Aurora join?
CREATE TABLE table_name_57 (year_joined__or_joining_ INTEGER, city VARCHAR)
SELECT AVG(year_joined__or_joining_) FROM table_name_57 WHERE city = "aurora"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_57 (year_joined__or_joining_ INTEGER, city VARCHAR) Question: What year did the team from City of Aurora join? [/INST] SELECT AVG(year_joined__or_joining_) FROM table_name_57 WHERE city = "aurora" </s>