<|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 legal restrictions, the national center for rural water supply & technical guidance (ncrwstg) and the chinese center for disease control & prevention (ccdc) do not share raw data related to water quality. at the discretion of the ncrwstg and ccdc, exceptions to this policy may be made. requests should be emailed to yewuban@crwstc.org with this paper's title in the subject line.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>