[{'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: Analysis and Research We use such cookies to follow up and improve our services and provide us with reference data for research and development of new services or functions. For example, these cookies helps us better understand the demographics of the WeChat user base, which in turn helps us consider what new WeChat features may be the most relevant for our users."}, {'role': 'assistant', 'content': 'This clause is unfair. The privacy practices mentioned are: Demographic_1stParty, Identifier_Cookie_or_similar_Tech_1stParty.'}]