<|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 data cannot be made freely available because of ethical restrictions. additional unpublished data are available upon request, please contact principal investigators professor adrian c. sleigh (adrian.sleigh@anu.edu.au) or associate professor samang seubsman (sam-ang.seu@stou.ac.th).<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>