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 browser ( id VARCHAR, name VARCHAR )
TABLE: CREATE TABLE accelerator_compatible_browser ( compatible_since_year VARCHAR, browser_id VARCHAR, accelerator_id VARCHAR )
TABLE: CREATE TABLE web_client_accelerator ( id VARCHAR, name VARCHAR )

### Question ###
When did the web accelerator 'CACHEbox' and browser 'Internet Explorer' become compatible?

### Accurate SQL ###

SELECT T1.compatible_since_year FROM accelerator_compatible_browser AS T1 JOIN browser AS T2 ON T1.browser_id = T2.id JOIN web_client_accelerator AS T3 ON T1.accelerator_id = T3.id WHERE T3.name = 'CACHEbox' AND T2.name = 'Internet Explorer'