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_84 ( release_date VARCHAR, developer_s_ VARCHAR )

### Question ###
Which Release date has a Developer(s) of microsoft research?

### Accurate SQL ###

SELECT release_date FROM table_name_84 WHERE developer_s_ = "microsoft research"