[{'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: 4.2. License to Use User Content You hereby grant Com2uS a worldwide, royalty-free, non-exclusive, and unlimited license to use any User Content that you upload, submit, or transmit through the Com2uS Service, including, without limitation, the right to sublicense and assign to third parties, and right to copy, reproduce, fix, adapt, modify, improve, translate, reformat, create derivative works from, manufacture, introduce into circulation, commercialize, publish, distribute, sell, license, sublicense, transfer, rent, lease, transmit, publicly display, and publicly perform. To the extent permitted by applicable laws, you hereby waive any moral rights you may have in any User Content. You may revoke such a license by giving a written notice to us at any time. In such a case, Com2uS will cease any use of the User Content within 3 months after receiving such a notice from you."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]