text: Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
  ### Context:
  CREATE TABLE accelerator_compatible_browser (compatible_since_year VARCHAR, browser_id VARCHAR, accelerator_id VARCHAR); CREATE TABLE browser (id VARCHAR, name VARCHAR); CREATE TABLE web_client_accelerator (id VARCHAR, name VARCHAR)
  ### Question:
  When did the web accelerator 'CACHEbox' and browser 'Internet Explorer' become compatible?
  ### Answer:
  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'