<|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: due to the sensitive nature of the data and the consent agreements signed by participants, data cannot be made publicly available. data are available upon request. please include a proposal for use of the data, which will be submitted to the authors ethics committee for approval. requests for the data may be sent to alfredhc@sjtu.edu.cn. the authors confirm that all interested parties will be able to obtain the data via the contact provided after some documentation is completed.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>