<|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 dataset used in this study is available upon request for ethical reasons. to request the data, please contact professor masamine jimba, department of community and global health, graduate school of medicine, the university of tokyo (mjimba@m.u-tokyo.ac.jp).<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>