<|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. due to ethical restrictions, the data cannot be made publicly available, but it is available upon request. the request should be directed to prof. philipp wild, philipp (wild@unimedizin-mainz.de, http://www.gutenberghealthstudy.org/).<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>