<|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 related to protecting both donor and patient confidentiality, data cannot be made publicly available. all relevant data are available upon request. data from this study are available from the senior author (ps), and validation cohort data are available upon request from authors ck jl jk sn ak ss sw mm mw.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>