<|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: there are ethical restrictions on the authors' data that do not allow them to make the data publicly available. data are available to qualified researchers on request from the authors, who may be contacted at anna.pivovarciova@gmail.com.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>