Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_86 (established INTEGER, country_territory VARCHAR)

### Question ###
What is the average year that the medical school in dominican republic was established?

### Accurate SQL ###

SELECT AVG(established) FROM table_name_86 WHERE country_territory = "dominican republic"