<|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: some access restrictions apply to the data underlying the findings. the data have been obtained from thomson reuters' web of science database. the license agreement with thomson reuters does not allow the authors to make the data freely available. readers can contact thomson reuters to obtain the data (http://thomsonreuters.com/thomson-reuters-web-of-science/). proquest data was obtained through an agreement with proquest lcc, and cannot be shared. readers can contact proquest at http://www.proquest.com/contact/contact-landing.html.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>