<|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: national hiv behavioral surveillance system data are available from the cdc. due to ethical restrictions regarding potentially identifying information, data for the place-based variables are available upon request. requests for all data may be made to gabriela paz-bailey, md, phd, msc (team lead for the behavioral surveillance team, bcsb/dhap/nchhstp/cdc) at gmb5@cdc.gov.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>