<|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: due to ethical restrictions and dutch law regarding respondent privacy, de-identified data are available upon request to qualified researchers. requests for data can be directed to professor kris vissers (head of the palliative care and pain center nijmegen; kris.vissers@radboudumc.nl) or the first author (jelle van gurp).<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>