<|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. data may not be made available in the paper, supplemental file or public repository due to ethical restrictions. however, data can be made available upon request. readers may contact joachim rosenbauer (joachim.rosenbauer@ddz.uni-duesseldorf.de) or anna stahl-pehe (anna-stahl@ddz.uni-dueseldorf.de) to request the data.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>