<|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: data are restricted for ethical reasons by the university of british columbia research ethics board. data requests can be sent to the oak tree clinic research group, who may be contacted via dmoney@cw.bc.ca. researchers requesting data must meet criteria for access to confidential data and data sharing activities must be approved by the ubc research ethics board.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>