You will be given a definition of a task first, then some input of the task.
Given a part of privacy policy text, identify the type of personal information which is collected, used, tracked or retained. The type of information should be present inside the given policy text, answer as 'Not Specified' otherwise

When a change is made to the privacy policy that significantly affects data practices, users receive no notification. Users' choices regarding policy changes are not mentioned or are unclear.
Output:
Not specified