<|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: access restrictions apply to the data underlying the findings. the informed consent given by study participants does not cover posting individual data in public databases. however, data from each study are available upon request by means of project agreements. for data, dr. stephan morbach, clinical expert of our amputation research study group, department of diabetes and angiology, marienkrankenhaus, soest, germany, needs to be contacted at http://www.marienkrankenhaus-soest.de.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>