[{'role': 'user', 'content': "Analyze the following clause from a privacy policy and determine if it's fair or unfair. Also identify any privacy practices mentioned: 7. Third-party Advertisers (a) We may allow third-party ad servers or ad networks to publish advertisements on or within our Services. These third-party ad servers or ad networks may use technology to send, directly to your browser, the advertisements and links that appear on or within our Services. They may thereby collect information including but without limitation via cookies or clear GIFS to measure the effectiveness of their advertisements and to personalise the advertising content you see."}, {'role': 'assistant', 'content': 'This clause is unfair. The privacy practices mentioned are: Identifier_Cookie_or_similar_Tech_3rdParty.'}]