<|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: requests for data will be received by the study principal investigator (ewh). data are available upon request for researchers who meet the criteria for access to confidential data. these data were collected under a certificate of confidentiality; there are thus ethical restrictions on this data that do not allow for public deposition.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>