<|begin_of_text|><|start_header_id|>system<|end_header_id|>

You are an expert at identifying data availability statements in scientific text. A data availability statement describes where research data can be found or how it can be accessed.<|eot_id|><|start_header_id|>user<|end_header_id|>

Determine if the following text contains a data availability statement. Answer with 'yes' or 'no'.

Text: third party data are available from the national aids information system. the use of the data needs to be approved by ncaids. requests for data may be directed to zhongfu liu, the deputy director of ncaids, email: zhongfuliu@163.com.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>