<|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 raw data included monthly records of hfrs cases, annual population data, and monthly meteorological data for hu county. the annual population data can be obtained from the health statistical yearbook without restrictions. the disease monitoring data and meteorological data are not open access to the public. according to the government, these data can be obtained and used only for scientific research and government use. therefore, these data are available upon request, and there are restrictions on their accessibility and use. researchers can access the disease monitoring and meteorological data by contacting authors xin tan and jing le. their email addresses are xintan1979@163.com and yanzhao1960@163.com.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>