<|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: due to restrictions imposed by the anhui medical university research ethics committee, data are available upon request. data are available from the urban household survey and rural household survey of the national bureau of statistics of china survey office, anhui province for researchers who meet the criteria for access to confidential data. please send requests to detong zhou (rd_15@ah.stats.cn), the manager of the survey data system and director of the national bureau of china survey office, anhui province.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>