[{'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: Sharing Health Data. A key value of HealthVault is the ability you have to share your health data with people and services that can help you meet your health-related goals. By default, you are the custodian of any records you create. Custodians have the highest level of access to a health record. As a custodian, you can share data in a health record with another person by sending an e-mail invitation through HealthVault. You can specify what type of access they have (including custodian access), how long they have access, and whether they can modify the data in the record. When you grant someone access, that person can grant the same level of access to someone else (for example, someone with view-only access can grant another user view-only access). Because inappropriate granting of access could allow someone to violate your privacy or even revoke your access to your own records, you should be cautious about granting access to your records."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]