[{'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: 5. Sharing of Information Comcast uses third parties to assist us in delivering parts of the Comcast Web Services to you. We may share portions of Your Data with these third parties to the extent necessary for them to provide these services. These companies are acting on Comcast's behalf and are required, by contract with Comcast, to keep this information confidential and are only authorized to use it for specific purposes. As described in more detail below, Comcast may also provide Non-PII elements of Your Data to third parties who deliver ads to you on Comcast's behalf. Comcast will not provide your PII to these advertisers unless you expressly authorize us to do so."}, {'role': 'assistant', 'content': 'This clause is unfair. The privacy practices mentioned are: Contact_Postal_Address_1stParty, Contact_Postal_Address_3rdParty, Contact_ZIP_1stParty, Contact_ZIP_3rdParty, Demographic_1stParty, Demographic_3rdParty, Demographic_Gender_1stParty, Demographic_Gender_3rdParty.'}]