<|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 we used in this work are pre-existing multi-channel physiologic recordings from eu siesta databases. all participants provided written informed consent. the detailed protocol of the siesta database can be found in the following link: kl_sch, g. et al. the siesta project polygraphic and clinical database. ieee eng. med. biol. mag. 20, 51_57 (2001). http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=932725.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>