<|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: the authors confirm that, for approved reasons, some access restrictions apply to the data underlying the findings. surveillance data is public domain and data can be extracted by users at the urls provided in the text. official surveillance data for 2012 is not currently publicly available. the authors were provided data up to march 2012, which will likely be slightly revised by the surveillance system when officially released. interim data is available upon request from prof. ricardo q. gurgel at ricardoqg@gmail.com.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>