<|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: the authors confirm that, for approved reasons, some access restrictions apply to the data underlying the findings. this research data were from the follow-up investigation of key projects of philosophy and social science research, and projects of key research institutes of humanities and social science of ministry of education, china, and any usage of these data will need the approval of the research projects' directors and relevant departments. by reason of an ethical restriction, our datas can not be made available in the manuscript, the supplemental files, or a public repository. if some readers want to request the data, they can contact xinchun wu (e-mail: xcwu@bnu.edu.cn), and contacting me for the data application will be also available (xiao zhou, e-mail: zxzhouxiao111@mail.bnu.edu.cn).<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>