<|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 data are available within the paper and its supporting information. the general social survey and its background information is publicly available through norc at http://www3.norc.org/gss+website/. the authors are not authorized to re-publish these data because they were obtained from a third party, but anyone can access the data from norc. for the authors' regional datasets (gsp and cera/cafor), multiple human-subjects protection agreements explicitly state that individual-level data cannot be made freely available. de-identified subsets of the individual-level data are available upon request to interested researchers, pending institutional review board approval. please send requests for the data to the corresponding author, lawrence hamilton.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>